Deer shed their fur twice a year, in the fall and summer. In the fall, deer shed their thin summer coat and grow a thicker, winter coat. In the spring, they shed their winter coat and grow a ...

Alteration of the expression of the co-called 'Sonic Hedgehog' gene can transform feet scale and wing feathers. While a transient over-expression of the gene can permanently turn feet scales into ...

Newly hatched White-necked Jacobin chick. Notice its dorsal fluffy down feathers. Newly hatched White-necked Jacobin chick. Notice its dorsal fluffy down feathers. Caterpillar of the family ...