Bertha Bement Sturgis

biology (1) bird characteristics (1) bird description (1) bird diet (1) bird distribution (1) Bird Field Guides (1) bird guide (1) bird habits (1) bird nesting (1) birding (1) birds (6) birds of Central America (2) birds of panama (1) birds(central america) (1) Canal Zone (1) Central America (2) check-list (1) D.C. (1) field guide (2) Hathaway Library (1) Local Author - Washington (1) natural history (1) nature guide (1) ornithology (1) Panama (4) R.R. (1) science (1) zoology (1)