Article: Birds of the Indigirka River Delta, Russia: historical and biogeographic comparisons.

JOHN M. PEARCE, (1) DANIEL ESLER (2) and ANDREI G. DEGTYAREV (3)(Received 22 September 1997; accepted in revised form 4 May 1998)ABSTRACT. We documented the breeding status and relative abundance of all avian species on the coastal portion of the Indigirka River Delta during spring and summer 1993-95. Data on avifaunal composition were then compared to data from adjacent areas from Eastern Siberia to the Chukotka Peninsula to evaluate how species composition changes longitudinally within the arctic and typical tundra zones of northern Russia. We recorded 63 species on the Indigirka River Delta, 37 (58.7 %) of which were confirmed breeders during at least one of the three ...

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