Vulpes vulpes the Red
Fox
Figure 1: Vulpes vulpes (Red Fox)
‘Fox posing for the camera’.
The
Red Fox (Vulpes vulpes) evolved
roughly 4 – 4.5 million years ago and is the largest fox within the Vulpes
genus (Macdonald, 2009). It is natively found in the northern hemisphere from
the Arctic Circle to North African and Central American deserts and has been
introduced into Asiatic steppes (Figure 2) (Macdonald, 2009). This fox has been
forced to adapt to multiple habitats due to its extensive range. During the
autumn and winter, the fox will grow a thicker pelt; this "winter
fur" keeps the animal warm in the colder environments. The newly grown fur
will then shed at the onset of spring, reverting back to short fur for the
duration of the summer (Macdonald, 1988), this is one example of how this
species has adapted itself to best suit its surrounding environments and climatic
conditions.
V.
vulpes are skilful predators. Their prey includes insects, small mammals
and sometimes birds (Henry, 1986). However the Red Fox is omnivorous, feeding
on plants as well as animals, typically eating ½ to 1kg of food a day, roughly
10% of its body weight (Amaike et al., 2015). The Red Fox is an opportunistic
feeder that samples any acceptable food, taking advantage of any seasonally abundant
food (Henry, 1986). These abilities to grow a thick pelt in the winter and to
change diet from season to season shows how this animal is a highly adaptable
species that is able to occupy many different environments, niches and habitats
and adapt itself to have the best possible chance at survival.
Very interesting post! Do you think that these adaptations have also facilitated the fox’s ability to be invasive?
ReplyDeleteMost defiantly! Both adaptations discussed in this week's blog would facilitate the fox’s ability to be invasive. The ability to grow extra fur for the winter means that the fox does not have to migrate to warmer environments for the colder seasons allowing it to have constant access to farmers livestock, for example. The fact that it is an opportunistic feeder is probably the best example of why this animal is classified as a pest in many countries. For example, when hungry the fox is able to take advantage of young or small livestock or crops.
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