THIS bird, known locally as the “Blue Mountain Duck” or “Booby Duck,” appears in a carefully compiled list of the birds of Jamaica, by Prof. A. Newton and his brother, the Hon. Ed. Newton, Colonial Secretary of Jamaica, published in the “Jamaica Handbook, 1881, p. 117, as follows:—“PROCELLARIIDÆ—Œstrelala jamaicensis, Bancroft, Jamaica Petrel. Procellaria jamaicensis, Bancroft, Zool. Journ. v. p. 81; Blue Mountain Duck, Gosse, “Birds of Jamaica,” p. 437 (Hill); Pterodroma caribbæa, Carte, P.Z.S. 1866, p. 93, Pl. x.” During certain seasons of the year it is remarkable that this sea-bird should be found in holes under trees and in burrows on the Cinchona plantations and in the unfrequented woods of the Blue Mountain range, at elevations from 6000 feet to 7000 feet. The natural inference was that the birds make their nests on these nlaces. But, although careful search has been made during the last two years, and a reward offered for nests, eggs, or any signs of nidification, nothing whatever has been found in that direction. It is therefore very probable that the birds use these holes and burrows simply as resting-places during the day, from whence they sally forth at night to their feeding-grounds at sea. The latter is distant only, as the crow flies, about twelve or fourteen miles. The birds are found in their burrows chiefly during the months of November, December, January, and March. Sometimes two lie in one hole, and dogs easily find them; but it has been noticed that the birds are always full grown, and with no apparent nest. I have been led to send you these remarks in the hope that possibly some of your readers with a wider knowledge of the habits of petrels might be able to give some clue as to the locality and general character of their nesting-places.