Cassin's Vireo

Vireo cassinii
Cassin's Vireo thumbnail
Length: 6 in. (14 cm )
Occurring in the tops of mixed deciduous and coniferous forests, the Cassin\'s Vireo is most easily located by its persistent song. Its cup-like nest is suspended in the fork of a small branch and made of grass and lichens. Insects make up most of the diet, but in mid-winter some fruits are eaten.

The four-digit banding code is CAVI.

Male | Herbert Clarke

Female | Oliver Niehuis


Fir forest

Mesquite bosque

Oak-pine woodland

Riparian / River forest
Bird Sound Type: Buzzing
Sex of Bird: Male
Sonogram Large:
Sonogram Zoom:

View Citation

You may need to edit author's name to meet the style formats, which are in most cases "Last name, First name."

Bibliographic details:

  • Article: Cassin's Vireo
  • Author(s): Dr. Biology
  • Publisher: Arizona State University School of Life Sciences Ask A Biologist
  • Site name: ASU - Ask A Biologist
  • Date published: July 13, 2017
  • Date accessed: October 23, 2021
  • Link:

APA Style

Dr. Biology. (2017, July 13). Cassin's Vireo. ASU - Ask A Biologist. Retrieved October 23, 2021 from

American Psychological Association. For more info, see

Chicago Manual of Style

Dr. Biology. "Cassin's Vireo". ASU - Ask A Biologist. 13 July, 2017.

MLA 2017 Style

Dr. Biology. "Cassin's Vireo". ASU - Ask A Biologist. 13 Jul 2017. ASU - Ask A Biologist, Web. 23 Oct 2021.

Modern Language Association, 7th Ed. For more info, see
Cancer cells from the parathyroid gland
How Many Types of Cells Are in the Human Body?

Be Part of
Ask A Biologist

By volunteering, or simply sending us feedback on the site. Scientists, teachers, writers, illustrators, and translators are all important to the program. If you are interested in helping with the website we have a Volunteers page to get the process started.

Donate icon  Contribute


Share to Google Classroom