Thick fur, short legs, hollow feathers to conserve heat, hairy feet to prevent slipping on ice, white color in winter for camouflage, migratory habits.
(Thick fur, short legs, hollow feathers; to conserve; heat; hairy feet to prevent slipping on ice) Context(Thick fur , short legs , hollow feathers to conserve,List([0, 50))):(hairy feet; to prevent; slipping on ice)
Thick fur , short legs , hollow feathers to conserve,List([0, 50))
Thick fur, short legs, hollow feathers hairy feet
to conserve to prevent
heat hairy feet to prevent slipping on ice
slipping on ice