On the immature dress of Microglossus aterrimus
Notes from the Leyden Museum , Volume 16 - Issue 3/4 p. 166- 167
Amongst a small number of birds, recently presented to the Leyden Museum by Mr. J. Bensbach, of late Resident at Ternate, I found a very interesting specimen of the Great Black Cockatoo from the Arfak Mountains, New Guinea, a specimen which I consider to be immature on account of the great extent of yellow on the black plumage and of the horny white color of the point of the bill and the front of the lower mandible. Unfortunately we know very little about the immature dress of this species, no nestling having been described as yet, and what is stated to characterize the young bird is the whitish tip of the upper and the horny white front of the lower mandible, as well as the more or less developed yellow cross-bars or vermiculations on the under wingand tail-coverts and the lower surface of the body.
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Büttikofer, J. (1895). On the immature dress of Microglossus aterrimus. Notes from the Leyden Museum, 16(3/4), 166–167.