Clayton M. White 

 Department of Zoology 

 575 Widtsoe Bldg. 

 Brigham Young University 

 Provo.Utah 84601 



Richard Fyfe 



Room 1110 



10025 Jasper Avenue 



Edmonton, Alta. Canada 



T5J 1S6 



James H. Enderson 



Dept. of Biology 



Colorado College 



Colorado Springs, Colorado 80903 



David B. Peakall 

 Laboratory of Ornithology 

 Cornell University 

 Ithaca, New York 14850 



Daniel D. Berger 



1328 N.Jefferson, Apt. 313 



MiWaukee, Wisconsin 53202 



WiUiam H. Bumham 

 Dept. of Zoology 

 Brigham Young University 

 Provo,Utah 84601 



Joseph J. Hickey 

 226 Russell Laboratories 

 University of Wisconsin 

 Madison, Wisconsin 53706 



James L. Ruos 



7145 Deer Valley Road 



Highland, Maryland 20777 



Walter R. Spofford, II 

 Aguila-Rancho 

 Portal, Arizona 85632 



F. Prescott Ward 

 302 Belfast Court 

 Joppa, Maryland 21085 



Wilston Shor 

 6614 32nd Street 

 Washington, D.C. 20015 



James N. Rice 



Contention Lane 



Berwy n , Pennsylvania 19312 



PREPARER'S COMMENTS 



It seems obvious that by far the most im- 

 portant factor contributing to the reproductive 



difficulties and population decline of the Arctic 

 peregrine, as in the case of the now-extinct eastern 

 Unites States population of the American pere- 

 grine, is high levels of chlorinated hydrocarbon 

 chemicals in the environment. Correction of this 

 situation should receive the highest priority in all 

 efforts in behalf of this species— J. W. Aldrich. 



LITERATURE CITED/SELECTED 

 REFERENCES 



A. O. U. 1931. Ahcek-list of North American 

 birds. American Ornithologists' Union, Lan- 

 caster, PA. 



Berger, D. C, D. W. Anderson, J. D. Weaver, R. 

 W. Risebrough and J. A. Keith. 1970. Shell- 

 thinning in eggs of Ungava Peregrines. Canad. 

 Field-Nat. 84:256-267. 



Berry, R. B. 1971. Peregrine Falcon population 

 survey, Assateague Island, Mary land, fall 1960. 

 Raptor Research News 5(ll):31-43' 



Bumham, W. H. 1975. Breeding biology and 

 ecology of the Peregrine Falcon in West 

 Greenland. MSc. thesis. Brigham Young Univ. 

 Provo, Utah. 



Bumham, W. H., M. A. Jenkins, F. P. Ward, W. G. 

 Mattox, D. M. Clement, and J. T. Harris. 19 74. 

 Falcon research in Greenland. 1973. Arctic 

 27:71-74. 



Cade, T. J. 1954. On the biology of falcons and 

 the ethics of falconers. Falconry News and 

 Notes 1:12-19. 



. 1960. Ecology of the Peregrine and Gyr- 



falcon populations in Alaska. Univ. Calif. 

 PubLZool. 63:151-290. 



Cade, T. S., and R. Fyfe. 1970. The North Amer- 

 ican Peregrine survey, 1970. Canad. Field-Nat. 

 84:231-245. 



Cade, T. J., C. M. White and J. R. Haugh. 1968. 

 Peregrines and pesticides in Alaska. Condor 

 70:170-178. 



Cade, T. S., J. L. Lincer, C. M. White, D. G. Ros- 

 eneau, and L. G. Schwartz. 1971. DDE resi- 

 dues and eggshell changes in Alascan falcons 

 and hawks. Science 172(3986):955-957. 



Campbell, R. W. and B. Davies. 1973. Nesting 

 raptor survey in western Canadian Arctic. En- 

 vironmental Protection Board Report; 1973, 

 Sect. 1. 



8 



