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As against larger wild dogs, such as wolves and African hunting dogs, smaller canid representatives had quite safely gone through both anthropogenous pressure, and climatic changes of the boundary of Holocene and Neocene. These animals – jackals, coyotes, foxes and even small varieties of feral domestic dogs – were successfully fixed in ecological niches of small and medium-sized predators, having caused new species in due course. So, in Siberia waheela, the descendant of polar fox, had evolved and in South America the feral representatives of domestic dogs became wild pack predators again, despite of approximately 16 – 20 thousand years of life near people.  In North America lupardus is one of the largest and widespread wild canids became ecological analogue of cheetahs, running felid representatives. It lives in prairies, but in areas where open spaces are replaced with forests and groves, other canid species live – the descendants of red and grey foxes.  The grey fox (Urocyon cinereoargenteus) lived in North and Central America to the south from Canada, and had, as well as other foxes, good amount of hardiness and ecological flexibility. In Neocene, despite of slightly increased pressure from the side of more progressive descendants of red foxes and coyotes, the grey fox quite safely evolved into new canid species – the lynx fox. In forests it occupies the become empty ecological niche of Canadian lynx which had become extinct in Holocene. Lynx fox is very large animal in canid standards: large самец can reach height of 130 cm rearing on hind legs of about 40 cm long. Weight of animal quite corresponds to growth – large foxes may reach weight of 60 kg: as much, as Euroasian waheela weighs. But, as against waheela, lynx fox can not change wool color in winter and in summer: the year round this animal has silver-gray fur which appreciablly turns white on the tip of tail. At adults males “collar” of pale-yellow fur grows on neck. On back of these animals there is an indistinct spotty pattern. It is clearly expressed at young individuals, and it helps them to escape from predators, hiding among grass and foliage. In course of growth animals lose this pattern, but at the southern borders of the area where more evergreen plants grow and winter is snowless, up to a fourth part of individuals keeps spotty colouring in adult condition, and separate populations include almost exclusively spotty individuals. The tail of this fox is long and thin – it serves as the balance weight at the movement on trees. Carpal and talocrural joints of animal are mobile and allow to hand and foot to turn on small angle – it helps lynx fox to climb on trees better. Muzzle of this animal is short and has large canines. However, canines serve mainly for demonstration – the angry animal starts “yawning”, turning to the opponent and widely opening mouth. Auricles are rather large, mobile, peaked, and have small hair brushes on tips. Despite of the growth and impressive canines, lynx fox has rather peaceful behaviour and is not squeamish in feeding: it is omnivorous and in autumn, in the time of fruiting of wild berries and trees it almost completely passes to vegetative food. It eats the greatest amount of food of animal origin at the end of winter and in early spring when stocks of vegetative forage accessible to this animal are exhausted. At this time lynx fox can even eat carrion. It also has kept abilities of ancestor to tree climbing and is quite capable to find prey and shelter for rest on trees. Forage of animal origin of this animal includes various animals and birds, but especial frequently it hunts hares, as well as its ecological prototype – Canadian lynx. The fox is afraid only of few animals: berls, huge mustelid representatives, and also of missopeho, Neocene American saber-toothed cat. But due to its secretive twilight habit of life and ability to tree climbing lynx fox almost does not face with these predators.  As against others large canids, lynx foxes do not form family groups. Females raise cubs independently; usually there are from 1 to 3 cubs in litter. They meet males only during a courtship season. It takes place at the end of winter; that time males arrange long duels, rising on hind legs. Also the winner male pursues the female for some time, estimating her force and the relation to him. Usually the female shows resistance only right at the beginning of courtship, if the male is pleasant to her. Avoiding male, the female, on the contrary, shows long resistance and tries to come nearer to other males which perceive her persecutor as the contender and attack him.  Voice of lynx fox is long lingering bark which may be heard at the great distance. With the help of voice animal declares rights to territory and calls the courtship partner. Cubs have thin squeaky voice and can utter sounds similar to twittering. Usual life expectancy of lynx fox is about 10 – 12 years.

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