An international team of researchers have discovered seven new species of tree frogs that make otherworldly calls in the rainforests of Madagascar. Their strange, high-pitched whistling calls sound ...
CDR copy FW-ASCH-7RR-0747 consists of frog calls which were used in conjunction with a presentation entitled "Amphibean Calls and Their Significance," presented by Charles M. Bogert at an August 1954 ...
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