A Flight-Time Integrator for Birds

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Abstract
A description is given of a device which will facilitate studies of flight behavior by measuring the total time spent in flight by birds. The instrument responds electrochemically during the individual periods when a bird to which the unit is attached rests on the water; these response times are accumulated (integrated) to provide the total period of activity. The unit provides the following minimum information total time of operation, i.e. total time birds are away from the nest and out to sea; total time of daylight (or some preselected level of illumination); total time spent on the water; total time of activity (on water) with the selected level of illumination.

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