Animal Vectors

Mallard Duck

Of all animal vectors, birds are the most important dispersal agent. Organisms can be dispersed by birds in three ways. Organisms, larvae, or eggs may be attached externally to the bird's plumage or transported within algae wrapped around to the birds feet, legs or head. Internally, live organisms may be defecated or regurgitated from a birds stomach, and released into the environment. Thirdly, organisms may be carried directly; for example, a piscivorous bird may accidentally drop a caught fish into a nearby lake.