For instance, researchers use the backyard sightings that users submit to Project FeederWatch —a joint program run by the Cornell Lab of Ornithology and Birds Canada —to track long-term changes in ...
Ducks, geese, swans -- Curassows, Guans -- Partridges, grouse, turkeys, old world quail -- New world quail -- Loons -- Grebes -- Shearwaters, petrels -- Storm-petrels ...
Seventeen short chapters with engaging narrative and lots of photos with information-packed captions illustrate the mechanisms by which birds produce the characteristic and sometimes brilliant ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback