172 The Flying Squirrel 
nip your finger when taken in the hand, while a red 
or gray will bite fiercely. 
My red and gray squirrels were quite tame, but 
they always lacked the complete confidence which 
was so apparent in the flying squirrel. The latter 
would nestle in my hand, crawl into my pocket or up 
my sleeve, or even go to sleep in my vest-front, evi- 
dently enjoying the warmth of my body. This 
natural affection and love of warmth are probably 
the reasons why several flying squirrels live together 
during the winter. 
My flying squirrels occupied a large cage with a 
wheel attachment, the revolving of which seemed 
to afford them much amusement. Sometimes both 
squirrels would revolve the wheel together at a very 
high rate of speed, and then, clinging to the wires, 
ride round and round until the wheel nearly came 
to rest. Then both would put it in motion, often 
repeating the performance for half an hour at a time. 
Again they would vary the entertainment by one 
doing the work and the other the riding. In fact 
they were apparently upon the lookout for new 
methods and combinations of revolving the wheel, 
and thus we were treated to a continuous and varied 
performance. 
A single incident is sufficient to illustrate their 
