Parasitism evolved at least 223 times, far more than the previous estimate of 60. It arose more times in certain phyla (e.g., arthropods, nematodes, flatworms, and mollusks) than in others. Today, ...

Many animal species add their eggs to the brood of other species to benefit from the latter’s brood care. This is called brood parasitism. Researchers recently studied brood parasitism in two ...

Conspecific brood parasitism (CBP), whereby females lay eggs in the nests of other conspecifics, occurs in over 200 species of birds. As an alternative tactic to typical nesting, CBP expands and ...

Members of the vertebrate group including anglerfishes are unique in possessing a characteristic known as sexual parasitism, in which males temporarily attach or permanently fuse with females to mate.

The parasitic wasp Dinocampus coccinellae is no fool. It controls a ladybug, lays an egg in its abdomen and turns it into the bodyguard of its cocoon. This surprising host-parasite manipulation has ...

The phenomenon of intraspecific germ cell parasitism may reveal a theoretical puzzle to the concept of Darwinian selection. In natural chimeras of the colonial protochordate Botryllus schlosseri, ...

Because of their unique life strategies and ecological success, researchers have long studied how parasitoids commandeer their hosts' bodies. However, the small size of these wasps and the challenges ...

Distinguished by its unusual morphology and a reproductive system based on something called "sexual parasitism," the anglerfish represents a study in how life adapts to severe environmental ...

Even among the most durable migratory bird pairings, sexual exclusivity is rarely part of their relationship Nathan H. Lents, Undark For generations, anthropologists have argued whether humans are ...