(35 classifications) (20 resources)
Africa
(2)
Australia (1) Breeding (9) California. (1) Canada (2) Classification. (1) Climatic factors (1) Counting (4) Databases (1) Ecology. (4) Effect of habitat modification on. (3) Effect of pollution on. (1) Evolution (6) Exhibitions (3) Flight (2) Genetics (1) Habitat (9) |
Handbooks, manuals, etc.
(1)
Identification (6) Illinois. (1) Louisiana (1) Migration (14) Monitoring (9) Nests (4) Nomenclature. (1) North America (3) North Dakota (1) Photographs (2) Pictorial works (5) Research (9) Seasonal distribution (1) Southwest, New (2) Study and teaching (7) United States (2) Wisconsin (1) |
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