Giant Cowbird Molothrus oryzivorus

  • Order: Passeriformes
  • Family: Icteridae
  • Polytypic: 2 subspecies
  • Authors: Peter E. Lowther


Conservation Status

The conservation status of the Giant Cowbird is rated as of Least Concern (BirdLife International 2009). The Giant Cowbird has an extremely wide geographic distribution, and the global population is large. Its relative abundance typically is assessed as "uncommon to fairly common" (Mexico; Howell and Webb 1995), "uncommon to locally fairly common" (Panama; Ridgely and Gwynne 1989), "uncommon to locally common" (Costa Rica; Stiles and Skutch 1989), "fairly common" (Amazonian Peru; Schulenberg et al. 2007), and "rather common" (Suriname; Haverschmidt 1968)

Effects of human activity on populations

No specific information except as affected by changes in available habitat. In Venezuela, the range may be spreading into the Andes following deforestation in that region (Hilty 2003). Formerly was widespread in the Cauca valley of Colombia, but now only a straggler to the region, as there are no extant colonies of host species there (Hilty and Brown 1986).

Recommended Citation

Lowther, P. E. (2010). Giant Cowbird (Molothrus oryzivorus), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA.