Emlen funnel

An Emlen funnel is a bird cage shaped like an inverted cone, used to study bird behaviour, in particular birds' migratory instincts. It is named after S T and J T Emlen who introduced the technique in 1966. An ink pad is placed on the bottom, so when the bird hops or flutters onto the sloping walls it leaves a track before slipping back down again. The bird's view through the top of the cage can be manipulated to show how it responds to different apparent "star patterns" (actually generated in a planetarium).

单词	Emlen funnel
释义	Emlen funnel 英语百科 Emlen funnel An Emlen funnel is a bird cage shaped like an inverted cone, used to study bird behaviour, in particular birds' migratory instincts. It is named after S T and J T Emlen who introduced the technique in 1966. An ink pad is placed on the bottom, so when the bird hops or flutters onto the sloping walls it leaves a track before slipping back down again. The bird's view through the top of the cage can be manipulated to show how it responds to different apparent "star patterns" (actually generated in a planetarium).
随便看	watched for的意思 watched light的意思 watched my back的意思 watched out的意思 watched out for的意思 watched over的意思 watched pot never boils的意思 watch engineer的意思 watch engineer room的意思 watcher的意思 watch error的意思 watcher的意思 watches的意思 watches for的意思 watches my back的意思 Watches of the Night的意思 watches or clocks的意思 watches or clocks, at prefixed times的意思 watches or clocks with electric means producing acoustic time signals at prefixed times的意思 watches out的意思 watches out for的意思 watches over的意思 watch的意思 watchet的意思 Watchet beds的意思