Records of ducks over baited waters
Coots and ducks
Coots and ducks
Coots and ducks
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Ducks at Lake Merritt
Greater scaups
Greater scaups
Greater scaup
Greater scaups
Greater scaups
Greater scaups
Greater scaups
Greater scaup
Greater scaups
Compilation of manuscripts on birds
Southern Oregon lecture I
Ducklings