Female white-necked jacobin hummingbirds do this in an exceptionally interesting way: some of them adopt male plumage to “trick” males into thinking they’re more threatening. As a result ...

When you whistle, the tone is produced by air whistling through a constriction. The tail chirp is produced by vibration of ...

Could there be an alternate explanation for this hummingbird cosplaying as a caterpillar? Maybe. The researchers think it’s possible that the long feathers that appear to mimic spines may have ...