"Ornithologie." . . "Bird watching." . . "Ornithology." . . . . . . "A guide for birdwatchers, with information on the evolution, anatomy, voice, flight, reproduction, hatching, winter habits, migration, and appearance of many different kinds of birds."@en . "A guide for birdwatchers, with information on the evolution, anatomy, voice, flight, reproduction, hatching, winter habits, migration, and appearance of many different kinds of birds." . . . . "Watching birds an introduction to ornithology"@en . "Watching birds an introduction to ornithology" . . . . . . . . . . "Watching birds : an introduction to ornithology. Illustrated by Margaret LaFarge. Foreword by Roger Tory Peterson"@en . . . . "Watching birds : an introduction to ornithology"@en . "Watching birds : an introduction to ornithology" . . . "Oiseaux." . .