(The fleeces and the wool of sheep that have been killed
by wolves, as also the clothes made from them, are exceptionally
infested with lice.)
11
Of insects, such as have teeth are omnivorous; such as have a
tongue feed on liquids only, extracting with that organ juices from
all quarters. And of these latter some may be called omnivorous,
inasmuch as they feed on every kind of juice, as for instance, the
common fly; others are blood-suckers, such as the gadfly and the
horse-fly, others again live on the juices of fruits and plants. The
bee is the only insect that invariably eschews whatever is rotten;
it will touch no article of food unless it have a sweet-tasting juice,
and it is particularly fond of drinking water if it be found
bubbling up clear from a spring underground.
So much for the food of animals of the leading genera.
12
The habits of animals are all connected with either breeding and
the rearing of young, or with the procuring a due supply of food;
and these habits are modified so as to suit cold and heat and the
variations of the seasons. For all animals have an instinctive
perception of the changes of temperature, and, just as men seek
shelter in houses in winter, or as men of great possessions spend
their summer in cool places and their winter in sunny ones, so also
all animals that can do so shift their habitat at various seasons.
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