NT
Zigzag Heron Zebrilus undulatus



Family: Ardeidae (Herons)

Authority: (Gmelin, 1789)

Red List Category

Criteria: A3c

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Justification of Red List category
This species qualified for uplisting from Least Concern to Near Threatened (under criterion A3c) during 2008-2012 because it was projected to decline by a rate approaching 30% over the next three generations (20 years) owing to deforestation in the Amazon, based on analyses in Bird et al. (2011) using the deforestation scenarios in Soares-Filho et al. (2006). The latter projected the impacts of 27 planned road-building projects in the region: 14 of which were due to be completed in 2008, six in 2012, and three each in 2025 and 2018. Hence the majority of the deforestation was projected to result from roads built during 2008-2012, but is projected to continue because the roads will provide easier access for hunters.

Population size:

Population trend: Decreasing

Extent of occurrence (breeding/resident): 7,100,000 km2

Country endemic: No

Attributes
Realm - Neotropical
IUCN Ecosystem -- Freshwater biome
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2017) Species factsheet: Zebrilus undulatus. Downloaded from http://www.birdlife.org on 19/10/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/10/2017.