Wild ducks conservation
Waterfowl protection and other manuscripts
Swans and Ducks
Swans and Ducks
Southern Oregon lecture I
Scaup Ducks
Redhead Ducks
Redhead Ducks
Redhead Ducks
Redhead Ducklings
Redhead Ducklings
Redhead Ducklings
Redhead Duckling
Redhead Duckling
Records of ducks over baited waters
Pintail Nest and Eggs
Pintail Ducks
Pintail Ducks
Pintail Duck on Nest
Pintail Duck on Nest
Pintail Duck on Nest
Pintail Duck on Nest
Pintail Duck on Nest
Pintail Duck on Nest
Pintail Duck on Nest
Pintail Duck Development
Pintail Duck
Pintail Duck