All it takes to make this bear cub happy is to sniff some daisies.
A new study finds that female hummingbirds who pass for males—think brightly colored feathers—fare better.

Ah, the hummingbird, that helicoptering creature that never fails to enchant whenever one buzzes by. With that long wand of a beak, that salt-shaker-sized body, and those unintelligibly quick wings, how could such creatures be anything but a marvel of nature?

Well, contrary to their petite and pretty appearance, it turns out that male hummingbirds are actually quite vicious towards the females they hope to mate with.