5 Most strange and beautiful birds in the world

5- Whistling Heron

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The whistling heron (Syrigma sibilatrix) is a medium-sized, often terrestrial heron of South America. There are two subspecies, the southern S. s. sibilatrix and the northern S. s. fostersmithi.

The whistling heron measures 53 to 64 cm in length and weighs 521 to 546 g. The southern subspecies is bigger but has a shorter bill in proportion to the body.

The overall impression of standing birds is gray, with flying birds showing conspicuous white rear parts (lower back, belly, and tail). In both subspecies, adults’ upperparts except the lower back are blue-gray.

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