They are capable of reaching speeds of up to 35 mph (55 km/h) and making vertical leaps of up to 5 yards (6 meters) in a single bound. As you can see from their weight, female jackrabbits are larger than males. The larger hares number three species: snowshoe, and black-tailed and white-tailed jackrabbits. The Black-tailed Jackrabbit and Pygmy Rabbit are species of concern in Montana. Hair, unique to this group of life, is generally light in color on desert dwellers. The mothers give birth to litters of around three to four kittens. Here in the desert near Tucson, rainfall averages. it helps them maintain internal body temperature in the hot desert climate. 5 to 3 inches long. 6 in (45. The largest species of jackrabbit is the white-tailed jackrabbit. Thus, a hot bird sleeks its feathers and stands tall to expose its legs to the air. Refer to Table A. The white-tailed jackrabbit is not as well represented in the literature as is the blacktailed jackrabbit, largely owing to the lack of long-term studies such as those devoted to black-tailed jackrabbits in northern Utah (Gross et al. They have a black stripe at the downward area of the back. To withstand the heat of the desert sun, the rabbit spreads out its large, thin ears, releasing heat as blood travels through the veins. Year-round mating. Appearance: The Jack rabbits look like your normal rabbits except for their remarkably big earsBy Laio. The disproportionately large ears of the jackrabbit have very thin skin and many blood vessels. Jackrabbits are herbivores able to thrive on some of the most defended and. Black-tailed jackrabbits are distinguished by black tails and ear-tips. You can play any type of slot for free. Kabul D. Consistent with this, divergence (d xy) across an ~88-kb interval overlapping ASIP was reduced between black-tailed jackrabbits and the white-tailed jackrabbit brown allele relative to simulated expectations (Fig. Studying Behaviour. 2 cm). Six weeks later, 1 or 2 baby jacks. Black-tailed jackrabbits live in American desert scrub lands. B lossom. They use these leaps and a zigzag running style to. Kangaroo Rat. The black-tailed jackrabbit is an herbivore. 2008), the Desert Southwest (Vorhies and. It is similar to species like the black-tailed jackrabbit and white-sided jackrabbit. Jackrabbits have a set of adaptations that suit them to arid and semiarid environments: a spartan diet with little water, camouflage, eyes on the sides of their. 2 cm). The antelope jackrabbit has a white belly, light grey sides, a back peppered with black, and orange coloration on the neck and chest. as a watery urine b. The Black-Tailed Jackrabbit lives in hot desert areas in the Western U. The black-tailed jackrabbit is long-legged and lean, about 17-31 inches, and weighs 3-7 pounds. 1b). The black-tailed jackrabbits (Lepus californicus) most identifying feature is its huge ears. Journal of Wildlife Management 22:371-384. One thing that makes them different from the black-tailed jackrabbit. The black-tailed jackrabbit is not really a rabbit; it is a hare because its young are born with fur. 1-5 years. What eats a jackrabbit in the desert? Jackrabbit Examples - Rarely aggression between species members, fighting between males over a female may occur during breeding season. 2018). Jackrabbits are huge; however, their size varies depending on the species. Black-tailed jackrabbit; Caracal; Black widow spider; Tarantula; Kangaroo mouse; Bighorn sheep; Golden eagle; Brown hyena; Black-backed jackal; Spiny-tailed iguana; Rock hyrax; Sandgrouse;. 6 to 10. 83 lb. This taxon is regarded by some authorities as being a subspecies of the. in the. In collaboration with the Biomimicry Institute, we delve into the cooling strategy of black-tailed jackrabbits and how it could inspire innovative solutions for human technology. Use material in your classroom, on- ks to locate images of a black-tailed jackrabbit (Lepus californicus) and a snowshoe hare (Lepus americanus). The black-tailed jackrabbit is a common inhabitant of the hot, dry desert scrubland. Highly cursorial animals are specialised for fast, sustained running via specific morphological adaptations, notably including changes in limb segment length and mechanical advantage. The brownish black-tailed jackrabbit is smaller than the antelope jack, at about 8 pounds (3. They become active at dusk and throughout the night. The large ears of this hare help it to lose heat and thereby cooling its body temperature. Its tail grows to lengths of 1 to 4 in (2. 5. Which of these students followed those directions? a. Black-Tailed Jackrabbits are some of the largest North American hares, reaching up to 2 feet tall. The black-tailed jackrabbit (Lepus californicus), also known as the American desert hare, is a common hare of the western United States and Mexico, where it is found at elevations from sea level up to 10,000 ft (3,000 m). Like most hares, Black-tailed Jackrabbits do not use burrows, but rest during the day in a scrape. 1-604. Others, like various bat species, grow long tongues to help them suck the nectar from plants. Black-tailed Jack Rabbit. 9, 2022 in nse settlement calendar august 2021 | executing broker definitionSTATUS, DISTRIBUTION, AND DENSITY OF THE WHITE-TAILED JACKRABBIT AND BLACK-TAILED JACKRABBIT IN SOUTH DAKOTA DUSTIN SCHAIBLE 3/16/07 The status of jackrabbit (Lepus spp. The black-tailed jackrabbit is not. aquaticus. Large ears help to regulate body temperature by releasing excess heat, which is especially important in the hot, open. " The long ears of a jackrabbit can transfer excess heat to the air through dilation of the blood vessels to the ear. 5 to 9 percent survive to 1 year of age. They have powerful hind legs that can propel them on leaps of more than 10 feet (3 meters) . It is one of the largest North American hares. Over a period of time, one characteristic (such as spots) is naturally advantageous over. While rabbits are known for their large ears, the black-tailed jackrabbit’s long ears stand out. They live in open grasslands and deserts across North America and Canada. The hares host many ectoparasites including fleas, ticks, lice, and mites; for this reason, hunters often avoid collecting them. Black-tailed Jackrabbit have: factors that “increase” vulnerability Risk of fire disturbance The sagebrush steppe, an important habitat for the black-tailed jackrabbit, is vulnerable to the projected increase in the frequency and severity of fires in the western United States. There are three main types of jackrabbits. The jackrabbit has long ears and long rear legs. Added 5/19/2022 1:51:33 AMIn 2015, the surveys found 6. coloration differentiates them from the 7 other rabbits and hares found here. 2002; Fisher 2012). 8 in) in length, brown above and white below. Maricopa harvester ant. Jackrabbits also sport powerful rear legs, which they use to reach speeds of up to 40mph. On upland sites. These speedy animals are capable of reaching 40 miles (64 kilometers) an hour. It is about 18-24 inches long and weighs four to eight pounds. Adult rabbits measure anywhere from 303 to 369 mm (11. Despite their name, jackrabbits are hares. ". Jackrabbit Examples - Jackrabbits show no form of social structure, this is in part due to their solitary nature. 6 kg). The antelope jackrabbit has a white belly, light grey sides, a back peppered with black, and orange coloration on the neck and chest. He was unable to distinguish between pellets from the two eagle species, which were active in the same areas, but found that 98% of pellets contained black-tailed jackrabbits. After their food have been. How do black tailed jackrabbits adapt in the desert? The most remarkable of the jackrabbits’ desert adaptations is the structure of their large ears. Status of the black-tailed jackrabbit in the U. One of the main ways jackrabbits keep cool in their desert climate is simply by staying out of the sun during the hottest parts of the day. This animal is well recognized through its large ears that could present 15 to 19 % of the. Its relatively long tail has a black stripe, and its long brown ears have black tips. For example, the black tailed jackrabbit has extremely large ears, which can reach a third of its body in length. Studies of mammalian ecology in southwestern North America with special attention to the colors of desert mammals. These adaptations are a direct result of evolution. The large ears of this hare help it to lose heat and thereby cooling its body temperature. 7-65 cm) and the tail measures from 2-4. In one hunting technique, a small group flies ahead and scouts, then another group member flies ahead. Why would the black-tailed jackrabbit evolve the following characteristics: large ears to regulate body temperature. Snowshoe hares with the adaptation of a brown-to-brown molt are more likely to survive and, uh, breed like rabbits. black-tailed jackrabbit. 1 in (10. Common chuckwalla. black-tailed jackrabbit. The adaptation of bird bills for thermoregulation could explain why many bird bills follow Allen’s rule 9. CLIMATE ADAPTATION The evolution of white-tailed jackrabbit camouflage in response to past and future seasonal climates Mafalda S. Lepus californicus. This species is highly capable of thermoregulating and conserving water. With habitat degradation, black-tailed jackrabbits have expanded, while the range of white-tailed jackrabbits has contracted. The Black-tailed Jackrabbit: A Desert-dwelling Hare. Twitter. Lepus californicus. This hare has large feet resembling a snowshoe. Amy: wildlife in or near water = turtles, crayfish, goldfish. The IUCN has listed this species as a "vulnerable species" because of its restricted range. Consumption of forage by black-tailed jackrabbits and salt-desert ranges in Utah. alleni was absent from the hottest and most-arid portions of the Sonoran Desert where the sole representative of the genus is the black-tailed jackrabbit, Lepus californicus. Weigh 2. 3. Black Walnut. They have fur on the bottoms of their feet, to keep them from being burned by the hot sand. Adaptations. Updated on March 08, 2017. Water conservation: These animals survive under scarcity of water in desert or chaparral biome by water retaining adaptation. What are physical and behavioral adaptations does the black-tailed jackrabbit? Feet and fur: They exhibit feet covered with fur so as to protect themselves from the hot desert sand. A 1958 study in California estimated that jackrabbit populations can run as high as 400 animals per square mile,. Jackrabbits grow between 18 and 26 inches long. It reaches a height of 70 to 90 feet and spread of 30 to 40 feet. Lepus californicus. 0. Its fur is a dark buff color that is peppered with black. The antelope jackrabbit is approximately the same size, but colored gray above with the lower sides mostly white. Black-tailed jackrabbit (Lepus californicu he Baja ce and limate. S. These hares are slimmer than rabbits and with longer ears and legs and the tail has black tips and fur. They have one to four litters per year with one to eight young per litter. Both males and females have a musky odor that originates from two rectal glands (Vorhies and Taylor 1933). They exhibit feet covered with fur to protect themselves from the hot desert sand. This allows them to extract all of the nutrition possible from their food. The black-tailed jackrabbit has large ears and long legs that help release heat. Sometimes in the desert, even these items can be hard to find. The Black-tailed Jackrabbit is a medium sized hare with exceptionally long ears and hind legs. Black-tailed jackrabbits produce about 10 to 12 young annually, giving birth to multiple litters during a three-month breeding season. 45 to 0. Cheatgrass encroachment following wildfires will likely further. 5 C) after its blood vessels dilate. The Sharp Adaptation of Porcupines Whales and Dolphins Labeling Page What Owls Eat -- The Bones of a Mouse. When the jackrabbit gets too hot, these blood vessels widen, which promotes heat loss. Tail: WHITE on top and below. Reasons for Decline It is likely that black-tailed jackrabbits are sufferingThe black-tailed jackrabbits (Lepus californicus) most identifying feature is its huge ears. The black-tailed jackrabbit has evolved with some of the. It has the name "snowshoe" because of the large size of its hind feet. 7 kg), the black-tailed jackrabbit is one of. The black-tailed jackrabbit has long ears with black tips and very long front and rear legs. White-tailed jackrabbit vs Black-tailed jackrabbit White-tailed jackrabbit vs Arctic hare Genetic divergence(d simulated, no selection simulated, selection empirical genome d xy Divergence (RND) D Quartet score > 0. The black-tailed jackrabbits (Lepus californicus) most identifying feature is its huge ears. They favor arid regions and areas of short grass rangeland from sea level to about 3,800 m. The snowshoe hare is 13–18 inches long, 2–4 pounds in weight and has an ear length of 3–4 inches. Arid and Semi-Arid Biomes Topic Test. Physical adaptations: Ears: These animals exhibit long ears. . 1 for the NatureServe (2011) ranking status of the black-tailed jackrabbit for the U. Imagine living in the scorching temperatures of Death Valley. In the summer they eat mostly green plants and flowers that are high in water content, so they do not require much water. ( Bachman, 1837) Swamp rabbit range. Using its keen senses of hearing and sight and its speed. Filter results by. The genus includes the largest lagomorphs. Typically, jackrabbits use them to hear well and as a body regulating adaptation that allows them to cool down in hotter temperatures. The white-tailed jackrabbit is the largest of the species. The black jackrabbit (Lepus insularis) is a species of mammal in the family Leporidae. What adaptations do black tailed jackrabbits have? Jackrabbits have a set of adaptations that suit them to arid and semiarid environments: a spartan diet with little water, camouflage, eyes on the sides of their heads, furry feet, agile flight and enormous ears. (3. 5 in) in length, and range in weight from. Eventually the name was shortened to jackrabbit. 5 Strange Facts about Squirrels. Larger than most rabbits, adult black-tailed jackrabbits grow to over two feet long and weigh up to ten pounds. Global temperatures continue to rise, it is possible that the adaptations of black-tailed jackrabbits may no longer be sufficient to cope with the increasing heat. These adaptations are most likely the result of their herbivorous lifestyle. The lifespan of this hare is five to eight years. It has long slender. 2008), the Desert Southwest (Vorhies and. HABITAT PHYSICAL CHARACTERISTICS SIZE DIET REPRODUCTION BEHAVIOR ADAPTATION LONGEVITY CONSERVATION SPECIAL NOTES Take a journey of. Discover the physical and behavioral adaptations that allow rabbits to succeed in their ecosystems. The chaparral biome is found in various continents, including the west coast of the United States, South America, Western Australia, and the Mediterranean coastal areas. Gray-sided Jackrabbit. After mating, the female, or doe, will have a litter of 1-6 leverets every 3-4 months. 2019), is capable of inhabiting many types of habitat, including grazing by. Reaching a length around 2 ft (61 cm), and a weight from 3 to 6 lb (1. The large ears of this hare help it to lose heat and thereby cooling its body temperature. There are three kinds of Jackrabbits: the Antelope Jackrabbit, the White-Tailed Jackrabbit, and the Black-Tailed Jackrabbit. only in the morning, Organisms that live in desert and desert-scrub biomes have. 2018). ) on the southwest slopes of some of the desert mountains but seldom inhabits coniferous forests (pinyon pine and juniper areas excepted), although occasionally it may stray into them. They have large eyes that are high on their head and placed toward the side. The Black-tailed Jackrabbit is capable of inhabiting many types of habitat (Flinders and Chapman 2003, Beever et al. and Mexico. I’ve never seen this in Idaho, and have rarely seen more than one or two in a hike. black-tailed jackrabbit. it allows them to retain more fat from food. They have physical adaptations to cope with the desert or chaparral environment. However, white-tailed jackrabbits have larger ears and feet compared to rabbits and exhibit a more. The Black-tailed Jackrabbit is commonly seen on pasture and waste land during the day, though it is mostly nocturnal. Black-tailed jackrabbits will eat their food twice. When threatened, they can also leap up to 10-20 ft. Black Tailed Jackrabbit Behavioral Adaptations;. Although antelope jackrabbits are primarily crepuscular, however, observers often saw animals moving throughout the day, especially in the afternoon as the sun began to set. After their food have been digested. Texas Jack. Discover how they hop and run so fast, their specialized eyes and. Mammals make up less than 1% of all animals on earth, but they include some of the most well-known species. Like other jackrabbits, the Black-tailed jackrabbit has distinctive long ears, and the long powerful rear legs characteristic of hares. 2018; Brown et al. 67 in the Southwest, 3. The black-tailed jackrabbit is the most abundant, widely distributed jackrabbit in North America, and is primarily found in the southwest. The white-tailed jackrabbit is a large species of hare and is the largest species called "jackrabbit". It is about 18-24 inches long and weighs four to eight pounds. Jackrabbits are strict vegetarians. But as the climate warms, the hares are increasingly ditching their winter wardrobes and keeping the brown fur they sport during the rest of the year. Lepus californicus Body Length: 17 - 21" Diet: Green vegetation, including tree leaves Jackrabbits are large hares with long legs. The Black-tailed Jackrabbit: A Desert-dwelling Hare. Black-Tailed Jackrabbits are some of the largest North American hares, reaching up to 2 feet tall. M. Ears of this jackrabbit are rimmed in white and tipped in black year round. 20-23 inches in total length. Mammalian Species, nos. Black-tailed jackrabbits have been documented across most of the western ¾ of the state, but they are most common in western Oklahoma. 5 to 10. 5. 4 to 2. NatureServe status by state* U. Kingdom Animalia animals. 5 to 3 inches long. Mammals make up less than 1% of all animals on earth, but they include some of the most well-known species. Long-tailed pocket mouse Perognathus formosus mohavensis Grapevine Mountains. Previous investigations. Did the black mamba make any adaptations to live in that habitat? yes. Jackrabbits have a set of adaptations that suit them to arid and semiarid environments: a spartan diet with little water, camouflage, eyes on the sides of their heads, furry feet, agile flight and enormous ears. It is hard 457 to draw an inference. storing water b. regulating body heat c. Expert Answer. "The common name "chuckwalla" comes from the Shoshone word tcaxxwal or Cahuilla word čaxwal, which Spanish explorers transcribed. These super-fast creatures “have 2 pairs of sharp front teeth, one pair on top, and one pair on the bottom. Jackrabbit Examples - No significant examples of imprinting in jackrabbits as this is rarely an adaptation which is beneficial in any way. Chaparral Animal Adaptations. Across the western United States, Leporidae are the most important prey item in the diet of Golden Eagles (Aquila chrysaetos). 1937. 2 cm) when fully grown. (NatureServe 2011). The Black-tailed Jackrabbit has an unusual habit: it eats its own feces (poop)! After food is digested for the first time, the rabbit eats its “cecal” pellets. (Mike Koshmrl/WyoFile) CHEYENNE—Take a wintertime walk around the nine-hole golf course ringing the Little America Hotel and Resort and a springy hare or 12 are bound to bounce. The swamp rabbit ( Sylvilagus aquaticus ), also called the cane-cutter, is a large cottontail rabbit found in the swamps and wetlands of the southern United States. Figure 8. Their color and shape vary by species, but generally they are tan, grey, silver, brown, or black. Black-tailed Jackrabbit. The Black-Tailed Jack Rabbit lives in the western United States and northern Mexico. A black-tailed jackrabbit. The black-tailed jackrabbit ( Lepus californicus ), also known as the American desert hare, is a common hare of the western United States and Mexico, where it is found at elevations from sea level up to 10,000 ft (3,000 m). Its body length ranges from 52 to 58 cm (22 in) long and its tail can be 5 to 10 cm (3 in) long. Eva’s Desert Mouse. a. We describe a previously unreported behavior of black-tailed jackrabbits based on 22 nocturnal observations in northwestern Texas in 1999 and 2000. The black-tailed jackrabbit is long-legged and lean, about 17-31 inches, and weighs 3-7 pounds. This jackrabbit lived in the Paria Canyon of southern Utah, but the species is abundant in the Great Basin, Colorado Plateau and Great Plains from shrub-grasslands up into pinon-juniper woodlands, though rarely into conifer forests with closed canopies. It requires mixed grasses, forbs, and shrubs for food, and shrubs or small trees for cover. The black tailed jack rabbit is a desert animal commonly seen in the sagebrush and pinon communities. 6 kilograms for four non-pregnant females (Foresman 2012b). 1. The range of the white-tailed jackrabbit overlaps that of the black-tailed jackrabbit, but the white-tailed jackrabbit prefers lowland plains and prairies, while the black-tailed jackrabbit lives at higher altitudes. 6 kg). Study with Quizlet and memorize flashcards containing terms like Camel humps are an adaptation for _______. True to their name, they have black-tipped tails, as well as black tips on their long ears. Their color and shape vary by species, but generally they are tan, grey, silver, brown, or black. The black-tailed jackrabbit is an important prey species for raptors and carnivorous mammals, such as eagles, hawks, owls, coyotes, foxes, and wild cats. Bat-eared Fox | image by Gregory Smith via Flickr | CC BY-SA 2. White-tailed jackrabbits, like their black-tailed relatives of the Southwest, are, as Lewis phrased it in his pale expression, “extremely fleet. Its fur is buff-colored to blend in with the arid environment. 2 cm) when fully grown. Brush rabbit. Of these, only the black-tailed jack rabbit (Lepus californicus) is a desert dweller, inhabiting all 4 southwestern deserts. It has long slender front legs and large hind feet that can be 5 inches in length. Movements, density, and mortality in a black-tailed jackrabbit population. 5 centimeters in length, 2. , A phenotype is a physical characteristic, while a genotype is the actual combination of alleles (Aa, AA, or aa). The WGS from the AK hare was combined with previously published whole genome sequencing of five black-tailed jackrabbits, three winter-brown snowshoe hares from OR, WA, and BC1, and three winter white snowshoe hares from MT, a hare from Utah (UT), and a hare from Pennsylvania (PA; Table S1; Jones et al. 0These adaptations are as varied as the deserts themselves, encompassing ingenious methods of water conservation in the arid Atacama, nocturnal lifestyles in the Sahara to avoid the relentless heat, and unique dietary strategies in the food-scarce landscapes of the Australian deserts. Black-tailed jackrabbits were not known in Washington when the first white settlers arrived in the early 19th century. Tehran Weegy: Dubai has caused the most damage to its. The scientists found three genes responsible for the colour. and ASIP between white-tailed jackrabbits and (C) black-tailed jackrabbits or (D. The Black-tailed Jackrabbit spends most of its day resting in a. Their diet changes seasonally. These are one of the two different species of jackrabbits that are found in Central America. Weegy. Young jackrabbits are born bright-eyed and active, and after. The Black-tailed Jackrabbit spends most of its day resting in a burrow in the ground. The throat, ventral surface and tail are white. The white-tailed jackrabbit (Lepus townsendii) is an iconic species in North American grasslands, sagebrush steppes, and shrub lands. Like antelopes, these hares also show flashes, as they run, of their white underside. From its physiology to its behavior, the jackrabbit has evolved to thrive in harsh conditions. 6 Winter coat color: White Intermediate Brown or Gray B Genome-wide White-sided jackrabbit Black-tailed jackrabbit Snowshoe hare. LARRY HYSLOP. She. The black-tailed jackrabbit, also known as the American desert hare, can reach speeds of up to 40 miles an hour and is capable of jumping more than 15 feet. , A phenotype is a physical characteristic, while a genotype is the actual combination of alleles (Aa, AA, or aa). Much larger than eastern cottontail rabbits, jackrabbits have longer ears and longer legs. The head and back are usually a mix of dark brown, rusty brown, or black. Contrast the advantages and disadvantages of each. A bird's leg temperature may increase 15 F (9. We show that light versus dark seasonal pelage in white-tailed jackrabbits (Lepus townsendii) tracks snow cover and is primarily determined by genetic variation at endothelin receptor type B (EDNRB), corin serine. 2019), is capable of inhabiting many types of habitat, including grazing by. The jackrabbit is a fascinating creature that has developed a range of amazing adaptations to survive in its unique desert habitat. 4 to 2. 24 in the Northeast and 0. Chisel-toothed kangaroo rat Dipodomys microps Harrisburg Flat in dry, sandy soil with sparse vegetation. In conformation, it is much like the white-tailed jackrabbit. It has distinctive long ears tipped with black. What are 4 adaptations of a volcano rabbit? 4 adaptations of volcanic rabbit are : Long ears Eyes on the sides of their heads Strong hind legs Comouflageblack- and white-tailed jackrabbits are all common prey items for golden eagles (Boyko et al. This includes classic three-reel slots as well as 3D five-reel slots with immersive bonus games and other special features. The black-tailed jackrabbit, Lepus californicus, is widely distributed across México and the United States (Flinders and Chapman 2003; Beever et al. Home range and activity patterns of black-tailed jackrabbits. Hares are also precocial, meaning they are born. Location of black-tailed jackrabbit (Lepus californicus) specimens from north Río Conchos (1-3; Chihuahua), south Río Nazas (4-8; Durango), and four groups (9-30; A-D) from the Baja California. Black-tailed Jackrabbit Snowshoe Hare a) Based on what you can see in the images, which of these hares is adapted for a. Hares live in open areas and rely on running in a zigzag pattern to escape their predators. •Between four and eight pounds, the black-tailed jackrabbit is the size of a small dog. Actually a hare, the speedy critter (it can move at 40 mph) is a resident of the Amon Basin, a major watershed of the upper Columbia. 5 to 10. This applies to the black-tailed jackrabbit as well, studying the species' behaviour gives us knowledge about the animal but also the Chapparal biome as a whole. The large ears of this hare help it to lose heat and thereby cooling its body temperature. me. Its fur is a dark buff color that is peppered with black. We know first-hand some of the characteristics that make mammals unique, like having hair, being able to sweat, and. (CBC/Alberta Environment and Parks)Black-tailed jackrabbits are common midsized herbivores that inhabit an extensive part of the arid and semi-arid regions of northern Mexico and western United States (Best, 1996). The jackrabbit's large ears hold dozens of small blood vessels which expand when the animal is hot, allowing more quantities of blood to flow through the ears and be exposed to the external environment, cooling the blood as it moves. This is because its young are born with fur and with their eyes already open. It occupies an elevational range from sea level to >2,500 m (8200 ft. A Review of the Ongoing Decline of the White-Tailed Jackrabbit. The black-tailed jackrabbits (Lepus californicus) most identifying feature is its huge ears. They will feed on a range of grasses and herbaceous plants. These discoveries demonstrate how the genetic basis of climate change adaptation can inform conservation. 6-4. The brownish or grayish ears are 2. The black-tailed jackrabbits (Lepus californicus) most identifying feature is its huge ears. Black-tailed jackrabbits weigh between 3 to 9 pounds while white-tailed jackrabbits range from 6 to 10 pounds; Size plays a crucial role in the jackrabbit’s adaptation to various habitats and evasion from predators; Basic Features and Identification. Both males and females have a musky odor that originates from two rectal glands (Vorhies and Taylor 1933). Oversized hind legs launch them across desert sage and grassy prairie, and their giant ears release heat to cool their bodies. Diet consists almost entirely of green vegetation. These animals have excellent hearing and can swivel them around to better pinpoint sounds. Promiscuous: Females mate with several males, and males mate with. The black jackrabbit ( Lepus insularis ) is a species of mammal in the family Leporidae. 5. This species can reach a weight of about 10 pounds and a length of over 2 feet. Life Span.