Which of the Following Features of Birds is NOT an Adaptation

Question

Which of the following features of birds is NOT an adaptation for flight?
A)endothermy
B)modified hind limbs
C)high metabolic rate
D)bones with numerous air spaces
E)feathers

Accepted Answer

Modified hind limbs in birds are primarily adapted for walking, perching, or swimming rather than for flight. The other options (endothermy, high metabolic rate, bones with numerous air spaces, and feathers) are all adaptations that facilitate flight.