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.[1] 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. 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).[2]

References

  1. ↑ Emlen S.T. and Emlen J.T. Jr. (1966). "A Technique for Recording Migratory Orientation of Captive Birds" (PDF). Auk. 83 (3): 361–367. doi:10.2307/4083048. JSTOR 4083048.
  2. ↑ Dingle, Hugh (1996). Migration: The Biology of Life on the Move. Oxford University Press. p. 88. ISBN 978-0-19-508962-2.


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