Host (biology)

The Roof rat (rattus rattus) is a host of bubonic plague.

A host is an organism which provides shelter for parasites. Parasites will live on the animal and may lay their eggs on them.

Host (biology) Media

Micropredator, parasite, parasitoid, and predator strategies compared. Their interactions with their hosts form a continuum. Micropredation and parasitoidism are now considered to be evolutionary strategies within parasitism.
Buff ermine moth caterpillar, a polyphagous micropredator
Influenza virus can change by genetic reassortment as it travels between different hosts in its range.
Mycorrhiza, a mutualistic interaction between a plant's roots and a fungus
Cleaning symbiosis: a Hawaiian cleaner wrasse with its client, a yellowtail wrasse
Nurse shark playing host to commensal remoras, which gain a free ride and which may serve as cleaners