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Topic
- Birds--Nests 15
- Swallows 15
- Birds--Eggs 10
Format
- image/tiff 15
Institution
- Oregon Historical Society 15
Taxon Class
- Aves 15
Order
- Passeriformes 15
Family
- Hirundinidae 15
Genus
- Hirundo 10
- Petrochelidon 2
- Stelgidopteryx 2
- Riparia 1
Decade
- 1900-1909 15