Suggested practices for raptor protection on powerlines
1975
Raptors
Hawks, owls and wildllife
1956
Craighead, John Johnson |
Craighead, Frank C. (Frank Cooper) |
The Galapagos hawk : an eco-geographical study with special reference to its systematic position
1973
Vries, Tjitte de |
Hawks aloft : the story of Hawk Mountain
1960
Broun, Maurice |
The hawks of North America : their field identification and feeding habits
1935
May, John Bichard |
Reproduction of the White-Tailed Sea Eagle, Haliaeetus albicilla (L.) in Sweden, in relation to food and residue levels of organochlorine and mercury compounds in the eggs
1983
Helander, Björn |
On the biology of the Spanish Imperial Eagle (Aquila heliaca adalberti)
1975
Meyburg, B.-U. |
British birds of prey : a study of Britain's 24 diurnal raptors
1976
Brown, Leslie |