Fresh-water fish, I find, eat seeds of many land and water plants; fish are frequently devoured by birds, and thus the seeds might be transported from place to place.

I forced many kinds of seeds into the stomachs of dead fish, and then gave their bodies to fishing-eagles, storks, and pelicans; these birds, after an interval of many hours, either rejected the seeds in pellets or passed them in their excrement; and several of these seeds retained the power of germination.

Certain seeds, however, were always killed by this process.

Locusts are sometimes blown to great distances from the land.

I myself caught one 370 miles from the coast of Africa, and have heard of others caught at greater distances.