Zigzag Heron (Zebrilus undulatus) lives in freshwater wetlands across South America. It feeds on fish and crustaceans. Its conservation status is Least Concern.
Fascinating facts about the Zigzag Heron
- The zigzag heron is the only member of the genus Zebrilus, a taxonomic group created in 1855. The genus name is a diminutive of the French word for zebra, and it was established by the French naturalist Charles Lucien Bonaparte; the genus remains monotypic with no recognised subspecies.
- Unlike most herons that carry twelve tail feathers, the zigzag heron has only ten rectrices, a trait it shares with true bitterns. DNA analysis has placed it unequivocally within the bittern lineage, confirming this anatomical similarity. Its short legs and neck, together with cryptic plumage, may represent ancestral features common to the broader Ardeidae family. This reduced tail count helps distinguish it from other herons.
- An adult zigzag heron stands about 32 centimetres tall and is cloaked in grey feathers marked with fine zigzag bars, with a pale underside; juveniles have a dark back with a brown head and underside. Because of this colour pattern the bird was once grouped with tiger herons, yet its morphology aligns it with bitterns.
- The zigzag heron inhabits the Amazon Basin east of the Andes but does not cross the Orinoco River basin in Venezuela nor extend east of the Tapajós River in the southeast. Its range includes Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela.
- Zigzag herons are extremely shy, remaining concealed in dense vegetation even as they search for food. They stay hidden in thick cover while foraging, making them difficult to observe in their swampy homes.
Sources
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At a glance
RangeSouth America
HabitatFreshwater wetlands
DietFish and crustaceans
About the Zigzag Heron
In the misty dawn of tropical wetlands, the Zigzag Heron emerges as a phantom, its slender form gliding effortlessly across the water's surface, the zigzag pattern of its plumage merging seamlessly with the dappled shadows. With each deliberate step, it probes the depths with its sharp, yellow bill, a master of stealth and patience in its pursuit of unsuspecting prey. As it moves, its very presence seems to embody the ephemeral nature of its habitat, a fleeting glimpse of beauty in a world where the boundaries between land and water are constantly shifting.
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