» This article is about the petrel seabirds. For other uses, see petrel (disambiguation). The flammable liquid is correctly spelt petrol. Petrels are tube-nosed seabirds in the bird order Procellariiformes. The common name doesn't indicate relationship beyond that point, as "petrels" occur in three of the four families within that group (except the Albatross family, Diomedeidae). Having a fossil record that was assumed to extend back at least 60 million years, the Procellariiformes was long con… (More on Petrel)