Muscicapidae
Cyornis caerulata albiventer
Junge, 1933: 105
Current name:
Niltava caerulata albiventer
Large-billed Blue Flycatcher
4 syntypes
Syntype: ZMA 14148, adult male, Batang Koewis (Deli, NE Sumatra, Indonesia), collected 30 Apr. 1915 for L.P. de Bussy (coll. nr. 278a); wing 76, tail 59, bill to skull 16.2, tarsus 16.8.
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Syntype: ZMA 14149, adult female, Soengei Tasik (Langkat, NE Sumatra, Indonesia), collected 26 Nov 1919 by A.F.C.A. van Heijst (coll. nr. 02); wing 69+ (outer feathers in moult, growing), tail 51, bill to skull 16.3, tarsus 16.1.
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Syntype: ZMA 14150, adult male, Soengei Tasik, collected 27 Dec 1919 by Van Heijst (coll. nr. 0136); wing 76, tail 56, bill to skull 16.5, tarsus 18.0.
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Syntype: ZMA 14151, adult male, Soengei Tasik, collected 27 Oct 1919 by Van Heijst (coll. nr. 1890); wing 75.5, tail 57.5, bill to skull 16.1, tarsus 17.8.
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Additional information
The original series of Junge (1933) consisted of these 4 syntypes only; apparently, no attempt was made to check Sumatran birds in the RMNH, while other pre-1930 birds from Sumatra now present in the ZMA were not available then. This subspecies differs from nominate caerulata in the purer white (less cinnamon-buff) lower belly and vent, which contrasts more sharply with the tawny-cinnamon of the remainder of the underparts.
Measurements
As far as types in the ZMA are concerned, all measurements were taken by C.S. Roselaar, unless otherwise noted, using the methods as described in Svensson (1992) and comparable with the data published in the Handbook of Western Palearctic Birds. All are in mm, and are given to the nearest mm when taken with a ruler and to one-tenth of a mm when measured with calipers.
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> Literature references
For all specimens in the ZMA bird collection, search or browse the GBIF Data Portal.