Brown-headed Cowbird
Molothrus ater
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassAves (Birds)
- OrderPasseriformes (Perching Birds)
- FamilyIcteridae (New World Blackbirds and Orioles)
- GenusMolothrus (Cowbirds)
- SpeciesMolothrus ater (Brown-headed Cowbird)
About the Brown-headed Cowbird
The brown-headed cowbird (Molothrus ater) is a small, obligate brood parasitic icterid native to temperate and subtropical North America. It is a permanent resident in the southern parts of its range; northern birds migrate to the southern United States and Mexico in winter, returning to their summer habitat around March or April.
The brown-headed cowbird was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in 1775 in his Histoire Naturelle des Oiseaux from a specimen collected in the Carolinas. The bird was also illustrated in a hand-colored plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle, which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. Neither the plate caption nor Buffon's description included a scientific name, but in 1783, Dutch naturalist Pieter Boddaert coined the binomial name Oriolus ater in his catalogue of the Planches Enluminées. The brown-headed cowbird is now placed in the genus Molothrus that was introduced by English naturalist William Swainson in 1832 with the brown-headed cowbird as the type species. The genus name combines the Ancient Greek... Wikipedia →
Closest Relatives at Saguaro National Park
Bronzed Cowbird
Molothrus aeneus
Great-tailed Grackle
Quiscalus mexicanus
Red-winged Blackbird
Agelaius phoeniceus
Hooded Oriole
Icterus cucullatus
Brewer's Blackbird
Euphagus cyanocephalus
Rusty Blackbird
Euphagus carolinus
Yellow-headed Blackbird
Xanthocephalus xanthocephalus
Bullock's Oriole
Icterus bullockii
Western Meadowlark
Sturnella neglecta
Scott's Oriole
Icterus parisorum
Common Grackle
Quiscalus quiscula
Baltimore Oriole
Icterus galbula
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
Quick answers
What are the chances of seeing a Brown-headed Cowbird in Saguaro National Park?
About 10% of wildlife watchers report a Brown-headed Cowbird sighting in Saguaro National Park, based on 5,224 verified sightings from GBIF citizen-science data.
When is the best time to see Brown-headed Cowbird in Saguaro National Park?
May has the highest sighting rate for Brown-headed Cowbird in Saguaro National Park in our monthly data.