Most mammals such as humans possess three types of photoreceptors in their eyes: cone cells, rod cells, and photosensitive retinal ganglion cells. Cone cells allow us to detect color vision in bright ...

Two weekends ago, I stumbled upon the most intriguing caterpillar I've ever seen — that of the Eastern Tiger Swallowtail butterfly. I briefly mistook the emerald green caterpillar for a leaf, but only ...

The eyes of an Australasian butterfly contain a record fifteen classes of light-detecting photoreceptors, six more than any other insect and far more than necessary for color vision. When researchers ...

Flitting among the cool slopes of the Appalachian Mountains is a tiger swallowtail butterfly species that evolved when two other species of swallowtails hybridized long ago, a rarity in the animal ...

AUSTIN, Texas—Flitting among the cool slopes of the Appalachian Mountains is a tiger swallowtail butterfly species that evolved when two other species of swallowtails hybridized long ago, a rarity in ...