From Opus

Revision as of 22:15, 25 October 2011

Adult Western male
Photo by Marysan
at Mission Trails Regional Park, San Diego, California, May 2005

Icterus cucullatus

Identification

112-128 cm (7-8 in)
Breeding male

• Orange -yellow head and nape
• Black back, face, throat, and upper breast
• Downward curved bill
• Black wings have two white bars
• Black tail
  

Female

• Olive-grey upperparts
• Yellow-green underparts
  

Juvenile: similar to female; male may show black on throat

Similar Species

On males notice the black facial mask goes down perpedicular to the line from eye to upper bill, so that the black area constitutes a square. Similar, black-faced, species have an angle smaller than 90 deg.

Adult female, before release
Photo by HelenB
At a banding station, Concan, Texas Hill Country, April 2005

Distribution

Breeds from central California, Nevada, central Arizona, southern New Mexico, and southern Texas southward through Mexico to Belize. Some of the Mexican breeders seems to have bred already in the same summer in the US before migrating to Mexico for their second round of nesting.

A few spend winters in southern California and southern Texas, most of the rest winter in Mexico.

Casual vagrant to Oregon and Washington. Accidental vagrant to Ontario, Quebec, and Louisiana.

Taxonomy

Subspecies

Currently, six subspecies are recognized by Clements^[1], with several others considered synonyms^[2]:
Eastern Group

Yucatan Male
Photo by stephennj
Cancun, Mexico, June 2004

• I. c. sennetti:

• Southern Texas (lower Rio Grande Valley) to eastern Mexico (Tamaulipas)

• I. c. cucullatus:

• South-western Texas (Del Rio) to south-eastern Mexico (Veracruz and Oaxaca)
  

Western Group

• I. c. nelsoni:

• Central California to northern Baja and north-western Mexico (southern Sonora, northern Chihuahua)

• I. c. trochiloides:

• Southern Baja California (latitude 27^oN to Cabo San Lucas)

• I. c. restrictus:

• North-western Mexico (southern Sonora)

• I. c. igneus (Yucatan):

• Yucatan Peninsula, Cozumel, Contoy, Holbox and Mujeres Island to Belize

Eastern Male
Photo by bobsofpa
Rest Area on US 77, Kenedy County, Texas, USA, April 2005

Habitat

Usually found in scrubby or open woods, desert, urban gardens and forests. Observed at heights around 5000 feet.

Behaviour

Breeding

They nest in tall trees, often in fan palms, cottonwoods, sycamores, oaks, and eucalyptus. The cup-shaped nest is made by the female and suspended from branches. The 3-5 white, pale yellow or pale blue eggs are incubated for about 12-14 days, by the female.

Their nests in California become parasitized by both the Bronzed Cowbird and Brown-headed Cowbird.

Diet

Diet includes fruit, nectar, and insects.

Gallery

Click on image to enlarge

First summer male Photo by bobsofpa Convention Center, South Padre Island, Texas, USA, April 2010

Western pair arguing Photo by tehag Nopoló, Baja California Sur, May 2008

References

1. Clements, JF. 2011. The Clements Checklist of Birds of the World. 6th ed., with updates to August 2011. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
2. Avibase
3. Paper describing migration to second breeding area
4. shawcreekbirdsupply
5. BF Member observations

• List of references

External Links