The Smith's blue butterfly may be tiny, but it's endangered in a big way. It spends its whole life within a few hundred yards of two native plants, seacliff buckwheat and coast buckwheat — and is ...

These big, yellow butterflies are common in the eastern United ... Female Eastern swallowtails tend to have more blue on the hindwings than the males. A dark form looks similar to a pipevine ...

The large blue butterfly has a strange life. After munching on wild thyme flowers for a few days, it drops to the ground and persuades a particular species of red ant to carry it into a nest.