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Review Of A Coloured Key To The Wildfowl Of The World, Paul A. Johnsgard
Review Of A Coloured Key To The Wildfowl Of The World, Paul A. Johnsgard
Paul Johnsgard
The Wildfowl Trust, Slimbridge. Gloucestershire. 96 pp., 23 plates. 1957. Price. 9 s. 6d. This hand·guide to alI the species and subspecies of the Anatidae is an elaborated version of an earlier black and white guide. mainly for use in assisting in the identification of live birds in the incomparable waterfowl coIlection at the Wildfowl Trust, but also of great value as a guide in any zoo or even under field conditions. A total of 147 species, comprising 247 forms, are shown, including both sexes where they differ noticeably. as weIl as major color phases of the polymorphic forms such …
Diving Birds Of North America: Color Plates, Paul A. Johnsgard
Diving Birds Of North America: Color Plates, Paul A. Johnsgard
Paul Johnsgard
1. Arctic loon, adult in breeding plumage. Photo by author. 2. Red-throated loon, nesting adult. Photo by Kenneth W. Fink. 3. Yellow-billed loon, adult in breeding plumage. Photo by Kenneth W. Fink. 4. Common loon, nesting adult. Photo by Kenneth W. Fink. 5. Pied-billed grebe, adult in breeding plumage. Photo by author. 6. Least grebe, adult and young. Painting by Mark E. Marcuson. 7. Red-necked grebe, nesting adult. Photo by author. 8. Eared grebe, adults with young. Photo by Kenneth W. Fink. 9. Horned grebe, nesting adult. Photo by Kenneth W. Fink. 10. Western grebe, adult with young. Photo by …
Birds Of The Great Plains: Family Certhiidae (Creepers), Paul A. Johnsgard
Birds Of The Great Plains: Family Certhiidae (Creepers), Paul A. Johnsgard
Paul Johnsgard
Brown Creeper
The Altruistic Cardinal?, Paul A. Johnsgard
The Altruistic Cardinal?, Paul A. Johnsgard
Paul Johnsgard
Cardinals also are known for their intense parental behavior. Most feeding of fledged young is done by the males, since females typically begin a new nesting cycle very shortly after their first young fledge. I’ve seen male cardinals feed female cardinals, cowbirds and house finches. One researcher in Oklahoma reported a cardinal attempting to feed goldfish in a pond! While photographing backyard birds in Lincoln, I noticed that a male cardinal was tending to a single newly fledged cardinal chick, but also was being constantly pestered by two young house finches. Cardinals raise their young on insects while house finch …
Ducks, Geese, And Swans Of The World: Tribe Tachyerini (Steamer Ducks), Paul A. Johnsgard
Ducks, Geese, And Swans Of The World: Tribe Tachyerini (Steamer Ducks), Paul A. Johnsgard
Paul Johnsgard
Flying Steamer Duck Magellanic Flightless Steamer Duck Falkland Flightless Steamer Duck The South American steamer ducks have at times been included with the shelducks, but differ enough from them in structure and behavior to be regarded as a separate but closely related tribe. There are three species very similar in appearance; two are essentially flightless. All are found off the coasts of southern South America and the Falkland Islands, where they feed on mollusks and other marine invertebrates. The males differ slightly from females in their plumage and vocalizations, but in both sexes iridescent coloration is totally lacking and only …
Buzz-Wings, Paul A. Johnsgard
Buzz-Wings, Paul A. Johnsgard
Paul Johnsgard
In Nebraska, the species of hummingbird most likely to be seen, and indeed the only one likely to be seen in the eastern half of the state, is the ruby-throated hummingbird. This is the most widely distributed of all North American hummingbirds, and its breeding range covers virtually all of eastern North America north nearly to Hudson Bay. The nesting range includes most of eastern Nebraska, but only along the Missouri River is nesting at all regular. Nests have been reported as far west as North Platte. Ruby-throats typically arrive in Nebraska in early April, with about half of the …
Waterfowl Of North America: Waterfowl Distributions And Migrations In North America, Paul A. Johnsgard
Waterfowl Of North America: Waterfowl Distributions And Migrations In North America, Paul A. Johnsgard
Paul Johnsgard
The species of waterfowl breeding in North America have distribution patterns that collectively reflect the past geologic and ecological histories of this continent. In general, our waterfowl species may be grouped into those that are limited (endemic) to North America, those that are shared between North and South America, and those that are shared with Europe and/or Asia. Of the forty-four species known to breed in continental North America, the resulting grouping of breeding distributions is as follows: Limited to North America: Snow goose (also on Greenland and Wrangel Island) , Ross goose, Canada goose (also on Greenland), wood duck, …
Handbook Of Waterfowl Behavior: Tribe Mergini (Sea Ducks), Paul A. Johnsgard
Handbook Of Waterfowl Behavior: Tribe Mergini (Sea Ducks), Paul A. Johnsgard
Paul Johnsgard
The tribe includes 20 species of which two are extinct. Except for two Southern Hemisphere species, the group is of northern and arctic distribution. All species consume a high proportion of animal material, although they are by no means all "sea" ducks. All dive extremely well, although the manner of diving varies in that some species usually open their wings when diving and others never do. All the species except the isolated Southern Hemisphere forms exhibit considerable sexual dimorphism in plumage, voice, and behavior, and there is much sympatry of ranges. Some genera (Somateria, Polysticta, Clangula, Melanitta) normally nest on …