. A history of British birds . come quite whitefor some years, and it may be that this takes longer with thefemales than with the males; otherwise there appear to beno appreciable external differences between the sexes whenfully matured. The nestling is of a nearly uniform rufous-buff, slightly darker on the throat; the crown and back streakedand mottled with blackish-brown. The young of this species may be distinguished from thatof H. nigra by its longer feet, with much more deeply incisedwebs ; paler rump and tail,—the latter being also lesspointedly forked—; the distinct white interior of t
. A history of British birds . come quite whitefor some years, and it may be that this takes longer with thefemales than with the males; otherwise there appear to beno appreciable external differences between the sexes whenfully matured. The nestling is of a nearly uniform rufous-buff, slightly darker on the throat; the crown and back streakedand mottled with blackish-brown. The young of this species may be distinguished from thatof H. nigra by its longer feet, with much more deeply incisedwebs ; paler rump and tail,—the latter being also lesspointedly forked—; the distinct white interior of the innerwebs of the outerprimaries, and the pure white—not grey—of the under wing-coverts. But the young of the White-winged Black Tern are not always to be so easily distinguishedfrom small Asiatic examples of the Whiskered Tern, , which will next be considered, although in Europeanexamples of each species the superior dimensions of the latterarc a sufficient indication. I WHISKERED TERN. GA VIJE. Hydrochelidon hybrida (Pallas*).THE WHISKERED TERN. Sterna leucopareia. The earliest discovery of the occurrence in the BritishIslands of this straggler from the south, was made by thelate Mr. T. C. Heysham, of Carlisle. At the end of August,1836, a party of two or three persons went out in a boat fromLyme, to amuse themselves in shooting sea-birds, and thisTern, among others, was part of the produce of their Heysham shortly afterwards having an opportunity ofexamining the skins of the birds obtained, selected that ofthe Whiskered Tern here figured, and made the arrangementby which the Author became possessed of it. In September, 1839, a second example was obtained at * Sterna hyhrida, Pallas, Zoographia Rosso-Asiatica, ii. p. 338 (1811). Thename of H. leucopareia (Natterer), wliich is often applied to it, was not con-ferred until 1820. 528 the mouth of the river Liffey, Dublin Bay, by Mr. John Hill,who shot the White-winged Black Tern
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Keywords: ., bookauthorsaun, bookcentury1800, bookdecade1870, booksubjectbirds
