Intermittent Gliding in the Hunting Flight of the Kestrel, Falco Tinnunculus L

Autor:	John J. Videler, Daniel Weihs, S. Daan
Rok vydání:	1983
Předmět:	biology Physiology Ecology Fixed position Kestrel Aquatic Science biology.organism_classification Geodesy Falco tinnunculus Displacement (vector) Wind speed Position (vector) Insect Science Flapping Animal Science and Zoology Molecular Biology Ecology Evolution Behavior and Systematics Geology
Zdroj:	Journal of Experimental Biology. 102:1-12
ISSN:	1477-9145 0022-0949
Popis:	The hunting flight of the kestrel (Falco tinnunculus) consists of short bouts of flight at wind speed against the wind with the eyes in a fixed position relative to the ground, and of short flights from one such position to the next. High speed films taken with a camera in a fixed position of a hunting kestrel of known weight and dimensions, allow estimates to be made of the amount of energy required for this behaviour. A theoretical model shows how a bird could economise by alternating flapping flight with short gliding bouts, without changing the position of the eyes above the ground, by mere displacement of the centre of gravity relative to the head. High speed film data confirm predictions from this model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7e3d73c785e32524f2458ad850d49339 https://doi.org/10.1242/jeb.102.1.1 Zobrazit plný text záznamu