Titlebook: Current Ornithology; Volume 2 Richard F. Johnston Book 1985 Plenum Press, New York 1985 Ornithologie.biology.ecology.ethology.genetics

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Assessment of Counting Techniques, but indices of abundance are needed to track the changing mix of species’ populations associated with plant succession. Still other studies, as of trophic dynamics, require knowledge of population densities. This chapter critically assesses the suitability of various counting methods for each of th

NADIR

Circadian Organization of the Avian Annual Cycle,asing daylengths in spring induce migratory and reproductive preparation. However, following breeding in summer when daylengths are still long, the reproductive system regresses and a complete feather molt occurs. Molting in turn is followed by metabolic and behavioral changes associated with fall m