Age in Relation to Migration in the Blue Jay
1946; Oxford University Press; Volume: 63; Issue: 1 Linguagem: Inglês
10.2307/4079911
ISSN1938-4254
Autores Tópico(s)Migration, Aging, and Tourism Studies
ResumoA new drongo from the Moluccas.--Duringa revision of the family Dicruridae, now in the process of preparation, two specimens of Dicrurus hottentottus from Morotai Island in the Rothschild Collection, American Museum of Natural History, were examined.These two specimens were identified as Dicrurus atrocaeruleus Gray.A comparison with typical atrocaeruleus from Halmahera showed that the Morotai birds belong to an undescribed race which I propose to call Dicrurus hottentottus morotensis, new subspecies TYPE: A.M.N.H. No. 672587; Rothschild Coil.; non-sexed adult; Morty [Morotail Island; no date; Dumas Coil.DIAGNOSIS: Similar to neighboring atrocaeruleus from Halmahera but considerably smaller in all measurements.Similar to carbonarius of New Guinea but with a shorter, less deep, and much more delicately shaped bill.ME/•StmEMENTS: Length of the bill taken from the anterior border of the nostril, 19.5, 20 (19.75) min.;wing, 148, 149 (148.5);outer tail feather, 134; central tail feather, 115, 115; depth of the fork, 19.Corresponding measurements of 16 adult specimens of atrocaeruleus: bill, • 22-25.5 (25.44), 9 22-24 (25); wing, 3 168-181.5(171.95), 9 162.5-165(165.5);outer tail feather, 3 150-165 (155.57), 9 142-155 (147); central tail feather, 3 152-145.5(159.27), 9 151-139 (155.66);depth of the fork averages, 3 16.$; 9 13.$4.Length of the bill in carbonarius, 262 specimens: 3 19-24.5(21.88), 9 18.5-24 (21.30).Depth of the bill at nostril: morotensis, 10, 10; carbonarius, 6 3: Numfor, 13; Waigeu, 12.5, 15; Bernhard Camp, 12.7, 12.8, 15.2 (average of 6 3 12.86); atrocaeruleus, 6 3: Halmahera, 12, 12, 12.5, 15, 15, 15.5 (12.66).
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