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This book outlines the principles of flight, of birds in particular. It describes a way of simplifying the mechanics of flight into a practical computer program, which will predict in some detail what any bird, real or hypothetical, can and cann[...]
Article
C. J. Pennycuick, Auteur ; Peter L. F. Fast, Auteur ; Ninon Ballerstaedt, Auteur ; Niels Rattenborg, AuteurExternally mounted transmitters or loggers may adversely affect migration performance for reasons other than the effects of added mass. The added frontal area of a payload box increases drag, and if the box triggers separation of the boundary la[...]
Article
The classical theory of cross-country soaring flight postulates climbs in discrete thermals, separated by glides through stationary air, and prescribes an "optimum" speed for the inter-thermal glides, based on the performance of the glider or bi[...]
Article
Understanding bird night and migration depends on field observations, theory and laboratory experiments. Like the legs of a tripod, these three elements depend on each other for support. No one leg can be extended too far beyond the others, with[...]
Article
C. J. Pennycuick, Auteur ; L. R. Griffin, Auteur ; Kendrew Colhoun, Auteur ; Richard Angwin, AuteurGPS transmitters were used with the Argos satellite system to track two Light-bellied Brent Geese (Branta bernicla hrota) from Iceland to Arctic Canada, three Greenland White-fronted Geese (Anser albifrons flavirostris) from Scotland to west Gre[...]
