Letters

SIRS,--In your September issue (antea, vol. xliv, p. 314) is a sight record by Mr. D. D. Harber oi a "Sooty Shearwater" seen off the Sussex coast, "some way out" to sea. The bird is described simply as " a large, all-black shearwater with a rather heavy body." Surely, when the oceans of the world contain a number of species that could be described similarly it is little more than guesswork to assume tha...