Hanging out with other guppies can offer protection against predators, but all that social mingling can set them up for breeding deadly parasites.

The shape of flowers has the biggest effect on how bumblebees acquire parasites, a study shows. The findings could influence what pollinator-lovers plant.

Scientists have uncovered an entire network of gastrointestinal parasite sharing among 17 wild and domestic herbivore species.

Bed bugs are pretty much universally reviled. But a public health entomologist explains how – while potentially traumatizing to deal with – they aren’t likely to make you sick.

Bedbugs are pretty much universally reviled. But a public health entomologist explains how – while potentially traumatizing to deal with – they aren’t likely to make you sick.

A world with more sublethal parasitic infections is a greener world. New research clarifies how that relationship works.

Bees offer insights into many scientific questions, from cooperating in close quarters to strategies for finding food.

Tiny marine worm larvae have a survival secret: they turn into carnivores, devouring microscopic crustaceans and other prey living in plankton.

A debilitating parasite is invading the guts of monarch butterflies, researchers say. "It's a signal that something is not right in the environment."

Watering holes in Africa quench the thirst of animals during dry seasons, but they're also hotspots for parasites that infect the animals.