Douglas Dewar, Jungle Folk: Indian Natural History Sketches
“ Frequently one sees a martin perch at the aperture for a few seconds without doing any work, and then fly off again. For every visit made with the object of doing work, ten or twelve seem to be made for the mere fun of the thing. Sand-martins appear to derive the greatest pleasure from the contemplation of the growing nursery. If the cliff be examined carefully, its soft sandy surface will be found to be scored in many places by marks made by the sharp little claws of the martins as the birds alight. ”
