Black swallowtail adults are sexually dimorphic, meaning that they have different color patterns--their ventral wing surfaces and their bodies are the same but their dorsal patterns differ. Thorax and ...

The Mourning Cloak Butterfly (Nymphalis antiopoa ) is one of the earliest (and the latest) flying butterflies in its native range, which spans widely across temperate North America and Eurasia. These ...

The air is alive with fluttering color at The Butterfly Estates: low-flying white peacock butterflies, soaring orange-and-black monarchs, buttery yellow-striped zebra longwings, electric-blue ...

Taking one image every 20 minutes, Pomerantz has put together nearly 1,000 images to encapsulate eight days of butterfly pupation—and the transformation is magnificent.

Painted lady caterpillars are gray-brown or almost black with a yellow stripe down their bodies and spikes along their sides and backs. They show some color variation when in caterpillar stage ...

The butterfly in the image is likely either a Western Tiger Swallowtail (Papilio rutulus) or a Canadian Tiger Swallowtail ...