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A solar powered leg-transmitter

Picture by J.C. Alonso

Bird: "Transmitter / R-Y-W + metal", banded in Spain on 15 November 1988

The picture shows a solar powered transmitter (with the solar pannels upwards). Note that, due to the length of the antenna in relation to the tarsus, and to avoid it touching the ground, a small yellow ring has been included above the intertarsal articulation. A metal spring covers the base of the antenna, and protect it avoiding that the bird would break it with its bill.
 

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© Javier A. Alonso (1998-2002)
http://www.ecwg.org/
mailto:jaalonso@bio.ucm.es