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When the ice melted the Holarctic clade spread south and east, while the Nearctic clade spread north, the two meeting in central Canada.Aubry’s data reveal more than just the distribution of foxes in pre-history, it also elucidates the relatedness of the animals currently inhabiting North America (see: Taxonomy).Previously it was believed that the first modern Red foxes (i.e.

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In their 1982 comparison of Red and Arctic ( comes from the Old World and dates to the early Pleistocene (between 1.8 and 1 mya) of Hungary and, in her 2008 study of Red fox dentition, Polish Academy of Sciences mammalogist Elwira Szuma suggested that the current line evolved either in Asia Minor or North Africa around this time.

As fox populations rose in Eurasia, those in North America appear to have dwindled.

The large ice sheet that covered most of Canada and the northern fringes of the USA from around 100,000 to 10,000 years ago (during the Wisconsin glaciation) kept the Red foxes in Alaska (the population of which was added to by a second wave of colonisation from Eurasia) separate from those in the southern USA.

So, the result was two isolated populations (or clades): one in Alaska (Holarctic clade) and one in the south (Nearctic clade).

Evolution and Early Distribution Taxonomy North American Red foxes British Red foxes Size Appearance and Colour Samson foxes Distribution Habitat Abundance Ageing and Longevity Mortality and Disability Parasites and Diseases Sexing Activity Dens/Earths and Resting Sites Senses Vision Hearing Smell Touch Territoriality and Home Range Predators Food and Feeding Types of prey consumed Prey switching The influence of age and sex on diet How much food?

Hunting strategies and behaviour Killing to ‘excess’ and the storage of left-overs Breeding Biology Reproductive development The number of breeding vixens Mating and monogamy Gestation, birth and litter size Growth and development of the cubs Behaviour and Social Structure Live and let live: the evolution of group-living With a little help from my friends: ‘helpers’ in fox society Keeping order and knowing your place: the social hierarchy All in the name of fun: fox body language Nightly interactions Communication: something to shout about Interaction with Humans The fox in literature and film The emblematic fox Foxes held in high esteem: gods, devils and worship The fox as a resource: fur, meat and sport The verminous fox: foxes as pests Man’s best friend?

Recent genetic work by Keith Aubry and his colleagues at the Pacific Northwest Research Station in Washington, however, has revealed new information on the spread of the Red fox in North America.

Aubry’s data suggest that this species first reached North America during the Illinoian glaciation that lasted from roughly 300,000 to 130,000 years ago; during the next 30,000 years (the Sangamon interglacial period) the foxes spread south from Alaska, across what is now the contiguous USA.

Whenever and wherever this species first appeared, fossil evidence suggests that the modern Red fox has been in North Africa for the last 700,000 years and Europe for at least the last 400,000 years.

In Britain, remains of the Red fox have been found in Wolstonian Glacial sediments from Warwickshire, suggesting that they were around between 330,000 and 135,000 years ago.

without any obvious assistance from humans) around 10,000 years ago.

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