Evolution

yellow-bellied sea snake

Why are there no sea snakes in the Atlantic?

Sea snakes are an evolutionary success story. With about 70 species, they’re the most diverse reptile group in the ocean, outnumbering sea turtle species 10-to-...
A mating pair of clearwing butterflies, Napeogenes sylphis, in eastern Ecuador. Florida Museum of Natural History photo by Keith Willmott

Diversity in butterfly mimicry maintained by predator distribution

When thinking of mimicry, most people picture two things that look identical, with little difference in pattern or color. In nature, the mimicking of one bright warning color pattern among insects is common because it lets predators know to avoid ...