While we are waiting (?patiently?) for spring to really get rolling, here are a few things to think about.

When a male anglerfish finds his mate in the pitch-black expanse of the deep sea, he uses his sharp teeth to latch onto her ...

As with protective dimorphism, the jack morph can be induced by certain environmental conditions. Interestingly, theory predicts that a high growth rate will favor the induction of jacks.

The gender-specific development of feathers in birds and the vibrant feather patterns that distinguish males from females, ...