3 ADULT RED-TAILED HAWKS TENDING A NEST

[1] Balfour E., 1957, Bird Notes, V27, P177

[2] BALFOUR E, 1957, BIRD NOTES, V27, P216

[3] BALFOUR FRS, 1924, COMMUNICATION 0524, P756

[4] Bengtson S. A., 1967, Oologists' Record, V41, P23

[5] Dent G., 1939, British Birds, V33, P51

[6] GREEVES N, 1926, BRIT BIRDS, V20, P77

[7] HAMERSTROM F, 1969, PEREGRINE FALCON POP

[8] HECHT WILLIAM R., 1951, WILSON BULL, V63, P167

[9] HENS PA, 1926, AVIFAUNA NEDERLANDIS

[10] JOURDAIN F. C. R., 1928, BRITISH BIRDS, V21, P200

[1] Balfour E., 1957, Bird Notes, V27, P177

[2] BALFOUR E, 1957, BIRD NOTES, V27, P216

[3] BALFOUR FRS, 1924, COMMUNICATION 0524, P756

[4] Bengtson S. A., 1967, Oologists' Record, V41, P23

[5] Dent G., 1939, British Birds, V33, P51

[6] GREEVES N, 1926, BRIT BIRDS, V20, P77

[7] HAMERSTROM F, 1969, PEREGRINE FALCON POP

[8] HECHT WILLIAM R., 1951, WILSON BULL, V63, P167

[9] HENS PA, 1926, AVIFAUNA NEDERLANDIS

[10] JOURDAIN F. C. R., 1928, BRITISH BIRDS, V21, P200