It generally frequents the inland sounds in very large flocks: I do not think I ever saw so many birds of any other sort together, as I once saw of these behind the island of Chiloe.

Hundreds of thousands flew in an irregular line for several hours in one direction.

When part of the flock settled on the water the surface was blackened, and a noise proceeded from them as of human beings talking in the distance.
There are several other species of petrels, but I will only mention one other kind, the Pelacanoides Berardi, which offers an example of those extraordinary cases, of a bird evidently belonging to one well-marked family, yet both in its habits and structure allied to a very distinct tribe.

This bird never leaves the quiet inland sounds.

When disturbed it dives to a distance, and on coming to the surface, with the same movement takes flight.