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Bhutan, The last Shangri-la
The Spirit of Living Things
 
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DrongoDrongo

An enterprising bird, the drongo forages individually on the insects herded out by the movements of other flocking birds. Insects compose 100 percent of a drongo's diet. As one might expect, drongos that tend to associate with larger flocks of other bird species (more than 20 birds) show increased numbers of foraging trips and harvest a larger number of insects in a given time than those associated with smaller flocks. The drongo and the other bird species do not compete for the same food source, so the relationship -- known as a commensal relationship -- is a good one for the drongo. Drongos are considered remarkable for the courage with which they will attack and dive off larger birds.
Drongo


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