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Cave Swallow: Song similar to Cliff, but "rubber stretching" phrase sounds more like typewriter clicks. Calls (e.g., 1st TX cut), heard more frequently, include a high, nasal new (higher than Cliff Swallow), and a rising whistled weet (more pure-toned than Barn Swallow). Call notes slightly higher-pitched in Florida populations (PR cut) than in Southwest.
Song and call:
Credits:All text copyright Michael O'Brien. All sounds copyright Macaulay Library. Image copyright Greg Lasley.