The Helm Identification Guides are a series of books that identify groups of birds. The series include two types of guides, those that are: Taxonomic,...
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world. Helm Identification Guides. Ferguson-Lees, J. & Christie, D.A. & Franklin, K. & Mead, D. & Burton, P.. (2001). Raptors of the world. Helm Identification...
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Birds of Africa. The Helm Identification Guides are a series, originally produced by Christopher Helm, covering the identification of groups of birds at...
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Helm Identification Guides. "Birds of the World: Hook-billed jite". 31 August 2014. Dunne, Pete (2012). Hawks in flight : the flight identification of...
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Peter (1997). New World Blackbirds: The Icterids (Helm Identification Guides). Christopher Helm Publishers Ltd. ISBN 0-7136-4333-1. "Redwing Turdus...
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Peter; Hathway, Ren; Wilczur, Jan (2000). Thrushes (Helm Identification Guides). Christopher Helm Publishers Ltd. ISBN 0-7136-3940-7. Oxford English Dictionary...
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Franklin, K. & Mead, D. & Burton, P.. (2001). Raptors of the world. Helm Identification Guides. Fitch, H.S. (1974). "Observations of the Food and Nesting of...
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Peter; Hathway, Ren; Wilczur, Jan (2000). Thrushes (Helm Identification Guides). Christopher Helm Publishers. ISBN 0-7136-3940-7. Klicka, John; Voelker...
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in flight. It is part of the Helm Identification Guides series. The book is Forsman's second about raptor identification, following his 1999 book The...
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(1997). Warblers of Europe, Asia and North Africa (Helm Identification Guides). Christopher Helm. pp. 256–259. ISBN 0-7136-3971-7. Snow, D. W.; Perrins...
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Franklin, K. & Mead, D. & Burton, P.. (2001). Raptors of the world. Helm Identification Guides. Gomez, LG; Houston, DC; Cotton, P; Tye, A (1994). "The role of...
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Franklin, K.; Mead, D.; Burton, P. (2001). Raptors of the world. Helm Identification Guides. ISBN 9780618127627. Poole, A.F.; Bierregaard, R.O.; Martell,...
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Peter; Hathway, Ren; Wilczur, Jan (2000). Thrushes (Helm Identification Guides). Christopher Helm Publishers Ltd. pp. 392–395. ISBN 0-7136-3940-7. Brackenbury...
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Tony; Parr, Mike (1998). Parrots: A Guide to Parrots of the World. Helm Identification Guides. London: Christopher Helm. pp. 475–476, plate 62. ISBN 1-873403-40-2...
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(1987). Wildfowl: an identification guide to the ducks, geese and swans of the world. Helm Identification Guides. London: Christopher Helm. ISBN 978-0-7470-2201-5...
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(1988). Wildfowl: An Identification Guide to the Ducks, Geese and Swans of the World (Helm Identification Guides). Christopher Helm. pp. 224–225. ISBN 0-7470-2201-1...
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Christopher Helm. ISBN 978-1-4081-0979-3. Baker, Kevin (1997). Warblers of Europe, Asia and North Africa. Helm Identification Guides. London: Helm. ISBN 0-7136-3971-7...
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Kevin (1997). Warblers of Europe, Asia and North Africa (Helm Identification Guides). London: Helm. pp. 256–259. ISBN 978-0-7136-3971-1. For instance in:...
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Franklin, K. & Mead, D. & Burton, P. (2001). Raptors of the World. Helm Identification Guides. Reichert, B. E., Cattau, C. E., Fletcher, J. R. J., W, S. J....
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Kevin (1997). Warblers of Europe, Asia and North Africa (Helm Identification Guides). London: Helm. pp. 256–259. ISBN 978-0-7136-3971-1. Dean, Alan; Bradshaw...
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Tracks and Signs of the Birds of Britain and Europe (Helm Identification Guides). Christopher Helm. p. 86. ISBN 978-0-7470-0201-7. Burton, Robert (1985)...
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Franklin, K. & Mead, D. & Burton, P.. (2001). Raptors of the world. Helm Identification Guides. Ragusa-Netto, J. (2000). "Raptors and "campo-cerrado" bird mixed...
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ISBN 978-1-4081-2501-4. Madge, Steve; Burn, Hilary (1994). Crows and Jays. Helm Identification Guides. pp. 95–97. ISBN 978-0-7136-3999-5. (although the text accompanying...
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Franklin, K. & Mead, D. & Burton, P.. (2001). Raptors of the world. Helm Identification Guides. Sherrod, S.K. (1978). "Diets of North American Falconiformes"...
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Helm Identification Guides. "Megascops kennicottii". Integrated Taxonomic Information System. Retrieved 4 April 2011. National Geographic Field Guide...
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Franklin, K.; Mead, D.; Burton, P. (2001). Raptors of the world. Helm Identification Guides. "Migratory Bird Treaty Act Protected Species". U.S. Fish & Wildlife...
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Alan (1999). Kingfishers, Bee-eaters and Rollers. Helm identification guides. London: Christopher Helm Publishers. ISBN 9780713652062. OCLC 42136069. Kasambe...
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; Quinn, D. (1996). Tits, Nuthatches & Treecreepers. Helm Identification Guides. Christopher Helm. ISBN 0-7136-3964-4. OCLC 943928899. Harrap, S (2018)...
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J. & Christie, D. (2001). Raptors of the World. Helm Identification Guides. London: Christopher Helm. pp. 717–719. ISBN 0-7136-8026-1. Brown, L. & Amadon...
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Africa (Helm Identification Guides). London: Helm. ISBN 978-0-7136-3971-1. Benítez, Vincent P (2008). Olivier Messiaen: A Research and Information Guide. London:...
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