摘要:

Summary1A brief description is given of the islands, the main habitats and their characteristic birds.2Twenty per cent of the Caithness avifauna is not established in Orkney, and 32 per cent, of the Orkney breeding birds are not established in Shetland. The same species fall away much more gradually to the north in Scandinavia.3Inter‐island distributions are tabulated.4Birch‐forest grew in Orkney in post‐Glacial times, but has now nearly vanished.5The bird races of the Outer Hebrides are related to those of Ireland. Orkney races have not been adequately studied.6At the present day 92 species breed regularly in Orkney, six formerly regular are extinct, and a number more have bred irregularly or doubtfully.7Points of biological interest in the annotated species list include (i.) marked fluctuations in many species; (ii.) recent colonization of Orkney in 26 species, mainly woodland birds and ducks; (iii.) marked habitat adaptations in Linnet, Rock‐Pipit, Song‐Thrush, Blackbird, Ring‐Dove and Fulmar; (iv.) habitat differences between Herring and Lesser Black‐backed Gulls; (v.) distribution of the two phases of th

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03992.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03993.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

摘要:

Thepurpose of this short treatise on the bills ofCerthia familiarisBritannica Ridgway is to point out an as yet unrecognized sexual character in the species.

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03994.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03995.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

摘要:

Thesenotes are based on observations made, as opportunities occurred, between September 1940 and July 1941 in widely separated localities in East Africa. They are, for the most part, sketchy and incomplete, for continued field work at any locality was never possible owing to preoccupation with duties, sudden moves, and other inconveniences. As there seemed little hope of being able to consult books of reference for many months to come, these notes have been written up in the field, and indulgence is asked for any inaccuracies that have occurred as a result.

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03996.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03997.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

摘要:

The following notes have been compiled in the hope that they will help to eluoidate some of the points mentioned in the various descriptions. In some cases further material has become available, and is here commented upon

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03998.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb03999.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb04000.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY

ISSN:0019-1019    

DOI:10.1111/j.1474-919X.1943.tb04001.x

出版商:Blackwell Publishing Ltd    

年代:1943

数据来源: WILEY