Brown-headed Cowbird Molothrus ater (Boddaert, 1783)    Synonyms: BHCO.
Kingdom Animalia   >   Phylum Chordata   >   Class Aves   >   Order Passeriformes   >   Family Icteridae   >   Genus Molothrus   

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Brown-headed Cowbird in Montgomery Co., Maryland (4/14/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). - Stephen John Davies via iNaturalist.

Brown-headed Cowbird in Montgomery Co., Maryland (4/19/2022). (c) Stephen John Davies, some rights reserved (CC BY-NC). - Stephen John Davies via iNaturalist.

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A male Brown-headed Cowbird in Baltimore Co., Maryland (2/11/2019). Photo by Bob Cammarata. (MBP list)

A male Brown-headed Cowbird in Pasadena, Maryland (2/9/2008). Photo by Bill Hubick. (MBP list)(More of this species)

A Brown-headed Cowbird in Baltimore Co., Maryland (5/1/2015). Photo by Jon Corcoran. (MBP list)

A Brown-headed Cowbird in Harford Co., Maryland (6/13/2014). Photo by Matthew Addicks. (MBP list)

A female Brown-headed Cowbird in Pasadena, Maryland (2/9/2008). Photo by Bill Hubick. (MBP list)(More of this species)

A Brown-headed Cowbird in Calvert Co., Maryland (4/15/2017). Photo by Ben Springer. (MBP list)

A female Brown-headed Cowbird in Baltimore Co., Maryland (2/11/2019). Photo by Bob Cammarata. (MBP list)

A female Brown-headed Cowbird in Baltimore Co., Maryland (8/13/2012). Photo by Frode Jacobsen. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (3/8/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

A female Brown-headed Cowbird in Pasadena, Maryland (3/7/2009). Photo by Bill Hubick. (MBP list)

Brown-headed Cowbird in Calvert Co., Maryland (5/22/2022). No rights reserved. Photo by Andy Wilson via iNaturalist. (MBP list)

Brown-headed Cowbirds in Howard Co., Maryland (5/7/2017). Photo by Sue Muller. (MBP list)

Brown-headed Cowbird in Harford Co., Maryland (7/28/2017). Photo by Mary Sweet. (MBP list)

Brown-headed Cowbirds in Anne Arundel Co., Maryland (3/27/2023). (c) David Illig, some rights reserved (CC BY-NC). Photo by davidillig via iNaturalist. (MBP list)

A male Brown-headed Cowbird bludgeons to death a competing male in his territory, Baltimore Co., Maryland (6/5/2011). Photo by Jon Corcoran. (MBP list)

An immature Brown-headed Cowbird in Calvert Co., Maryland (6/12/2017). Photo by Ben Springer. (MBP list)

A young Brown-headed Cowbird in Baltimore Co., Maryland (5/15/2010). (c) Frode Jacobsen, some rights reserved (CC BY-NC). Photo by Frode Jacobsen. (MBP list)

A juvenile Brown-headed Cowbird in Anne Arundel Co., Maryland (5/10/2014). (c) Frode Jacobsen, some rights reserved (CC BY-NC). Photo by Frode Jacobsen. (MBP list)

A young Brown-headed Cowbird being raised by a Gray Catbird in Prince George's Co., Maryland (6/5/2016). Photo by Barbara Thurlow. (MBP list)

A juvenile Brown-headed Cowbird in Montgomery Co., Maryland (7/15/2020). (c) Floyd E. Hayes, some rights reserved (CC BY-NC). Photo by floydehayes via iNaturalist. (MBP list)

A juvenile Brown-headed Cowbird being fed by its foster parent, a Chipping Sparrow, in Baltimore Co., Maryland (6/5/2011). Photo by Jon Corcoran. (MBP list)

A Northern Parula (left) feeding a Brown-headed Cowbird chick (right) in Harford Co., Maryland (6/26/2013). Photo by Matthew Addicks. (MBP list)

A male Brown-headed Cowbird in flight over Baltimore Co., Maryland (5/2/2020). (c) Frode Jacobsen, some rights reserved (CC BY-NC). Photo by Frode Jacobsen. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (5/6/2023). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (11/5/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (3/26/2023). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (10/21/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Brown-headed Cowbirds in Montgomery Co., Maryland (11/5/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (10/20/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (8/6/2023). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Brown-headed Cowbird in Montgomery Co., Maryland (8/6/2023). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

A recently fledged Brown-headed Cowbird in Howard Co., Maryland (7/7/2019). Photo by Sue Muller. (MBP list)

A female Red-winged Blackbird (left) and presumed juvenile Brown-headed Cowbird (right) in Howard Co., Maryland (11/25/2013). Most would agree this behavior suggests that the Red-winged Blackbird was the foster parent of the Brown-headed Cowbird. (Brown-headed Cowbird is a brood parasite.) Photo by Richard Orr. (MBP list)

A Brown-headed Cowbird egg in an American Robin nest in Howard Co., Maryland (3/6/2018). Photo by Sue Muller. (MBP list)


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