Posted by on September 3, 2010
Wolves primarily feed on medium to large sized ungulates (sometimes 10–15 times larger than themselves), though they are not fussy eaters. Medium and small sized animals preyed on by wolves include marmots, hares, badgers, foxes, polecats, ground squirrels, mice, hamsters, voles and other rodents, as well as insectivores. Wolves kill and eat other animals for food. Depending on where they live, wolves live mainly on the meat from such animals as deer, moose, elk or bison. They also eat beavers,rabbits and even mice. They do not eat humans. Wolves are not a threat to humans!
Posted by on September 2, 2010
Wolves are generally monogamous.If one of the mated wolves does not die mated pairs usually remain together for life. The pairs will be re-established quickly depends Upon the death of one mated wolf. Since males often predominate in any given wolf population, unpaired females are a rarity. Polygamy does occur, but primarily in captive situations.
The age of first breeding in wolves depends largely on environmental factors :
In order to exploit the newly available resources when food is abundant or when wolf populations are heavily managed wolves can rear pups at younger ages.
Captive wolves have been known to breed as soon as they reach 9–10 months, while the youngest recorded breeding wolves in the wild were 2 years old. Females are capable of producing pups every year, with one litter annually being the average. Unlike coyotes, wolves never reach reproductive senescence before they die. Incest rarely occurs, though inbreeding depression has been reported to be a problem for wolves in Saskatchewan and Isle Royale.
When receptive, females will avert the base of their tails to one side, exposing the vulva. During mating, the pair is locked into a copulatory tie which may last 5–36 minutes. Because estrus in wolves only lasts a month, the males do not abandon their mates to find other females to inseminate as dogs do. During pregnancy, female wolves will remain in a den located away from periphoral zone in their territory, where violent encounters with other packs are more likely. Old females usually whelp in the den of their previous litter, while younger females typically den near their birthplace. The gestation period lasts 62–75 days, with pups usually being born in the summer period. The average litter consists of 5–6 pups. Litters of 14–17 occur 1% of the time. Litter sizes tend to increase in areas where prey is abundant. Wolves bear relatively large pups in small litters compared to other canid species. After the birth of the pups, Pups are born blind and deaf, and are covered in short soft grayish-brown fur. The weigh of the each wolf pups at birth is upto 300–500 grams, and begin to see after 9–12 days. The milk canines erupt after one month. For the first few weeks Mother wolves do not leave the den , relying on the father wolf to provide food for them and their young. If the mother dies prior to the pups weaning period, they are suckled by the pack’s other females. Pups begin to eat solid food at the age of 3–4 weeks. Pups have a fast growth rate during their first four months of life: during this period, the pup’s weight can increase nearly 30 times.
Posted by on September 2, 2010
Being better suited to bone crushing the teeth of the wolf are heavy and large than those of other extant canids, though not as specialised as those found in hyenas. The canine teeth are robust and relatively short (26 mm).The animal can develop a crushing pressure of perhaps 1,500 lbf/in2 compared to 750 lbf/in2 for a German shepherd. This force is sufficient to break open most bones,as well as cut through half inch lassos with one snap. The distinguish between the German Shepherd and wolf is their orbital angle 40°–45° and the greater size of their heads and teeth but the wolf’s were similar to German shepherds. While comparing with coyotos wolves are larger and have broader snouts, shorter ears, and a proportionately smaller braincase and lack sweat glands on their pawpads. While comparing with golden jackals wolves are larger and heavier, and have proportionately longer legs, shorter torsos and longer tails. The teeth are overall less trenchant than the jackal’s, particularly in the upper molars, which have lower cusps, are broader, and are more teeter.
Posted by on September 2, 2010
Gray wolves are slender, powerfully built animals with large, deeply descending ribcages and sloping backs.With their comparatively small paws their limbs are long and robust. The front paws have five toes each, while the back paws have four.
Gray wolves are also capable of running at speeds of 56–64 km (34–38 miles) per hour, and can continue running for more than 20 minutes. In cold climates to conserve body heat wolves can reduce the flow of blood near their skin. The intestines of adult wolves measure 460–575 cm, the ratio to body length being 4.13–4.62.[33] The stomach can hold 7–9 kg (15–20 lb) of food[24] and up to 7.5 liters (8 U.S. qt) of water.[34] The liver is relatively large, weighing 0.7–1.9 kg (1.6–4.2 lb) in males and 0.68–0.82 kg (1.5–1.8 lb) in females. The heads of wolf’s are large and heavy, with wide foreheads, strong jaws and long, blunt muzzles. The ears are relatively small and triangular. Wolves usually carry their heads at the same level as their backs, raising their heads only when alert.
Posted by on September 2, 2010
The largest wild member of the Canidae family are gray wolf (Canis lupus). Wolves are legendary because of their spine-tingling howl, which they use to communicate. A lone wolf howls to attract the attention of his pack, while communal howls may send territorial messages from one pack to another. Some howls are confrontational. Much like barking domestic dogs, wolves may simply begin howling because a nearby wolf has already begun.
Posted by on September 2, 2010
Posted by on September 2, 2010
Posted by on September 2, 2010
Posted by on September 1, 2010
Posted by on September 1, 2010