The trumpeter swan : its history, habits and population in the United States
1960
Banko, Winston E. |
North American fauna
The California condor, 1966-76 : a look at its past and future
1978
Wilbur, Sanford R. |
The screech owl : its life history and population ecology in northern Ohio
1975
VanCamp, Laurel F. |
Henny, Charles J. |
Birds of the St. Croix River valley : Minnesota and Wisconsin
1981
Faanes, Craig A. |