Current & Upcoming WFVZ Events

12th ANNUAL FALL OPEN HOUSE!! - OCTOBER 25TH! from 10:00 to 4:00pm - FREE for members, $3.00 per person or $5.00 per family. 

Like our Facebook page and see all of our upcoming events and photos!
Public Tour: Friday, September 26th, from 3-4 p.m.  Call in advance   -- group size limited to 20 people (805-388-9944).  $5 per adult; FREE for kids ages 5 and under and WFVZ Members!


Spring Open House:      WAS May 3rd 2014!  Check out our Facebook Page!

 11th Annual Fall Open House was a great success! Check out the photos on Facebook!!


See René Corado's visit to University of the Valley, Guatemala

Check our 9th Annual Open House! Video   

Now on Facebook!   See video of the WFVZ's collections, and pictures of our trip to Costa Rica and where we work in Guatemala! 

Follow us on Twitter

Check the museum video on youtube!


National Science Foundation Grant Recipient



New and now available, 'Birds' Nests of the World', by Mamoru Suzuki.  Edited by René Corado and Linnea Hall.

Review by Ian Paulsen

Also, this is our book on the eggs and nests of the Western Foundation of Vertebrate Zoology, by WFVZ Executive Director Dr. Linnea Hall and Collections Manager René Corado, with photos by Rosamond Purcell Egg and Nest See our Gift Store page for information on both books! 


Read reviews of the book:  10,000 Birds, Audubon, The New York Times, American Scientist

Traducir a Español con BING


Donate to the WFVZ using PayPal!

The Bird Collections PDF Print E-mail

Eggs and Nests


Groove-billed Ani eggs and nest
The WFVZ houses approximately 225,000 sets of eggs (equal to more than 1,000,000 individual eggs), representing at least 4,000 bird species from around the world, and collected from more than 400 individual and institutional collections. The egg collection of the WFVZ is the largest in the world.

Willow Ptarmigan eggs.
The Western Foundation’s collections have contributed to multiple scientific fields (e.g., conservation, ecology, taxonomy, and toxicology). For example, the WFVZ provided photocopies of egg records for more than 500 species, and egg measurements for more than 400 species, covered by the Birds of North America series. This information and digital pictures of these eggs and nests are now available at  The Foundation’s egg sets have also figured prominently in studies of eggshell thinning due to contaminants (e.g., DDT and heavy metals). Since 2000 alone, the WFVZ has contributed data to more than 200 publications. Thus, the value of the WFVZ’s collections for science, and for the conservation of bird species, continues to be evidenced.

Staff of the WFVZ provide data on eggs, including measurements and digital images, to researchers. Please contact René Corado, Collections Manager, for more information, and see our list of services available to researchers.


Guatemalan eggs collected by René Corado and now in the WFVZ collections.


The Foundation has more than 18,000 specimens from around the world, representing the largest collection of nests in North America and the world.

WFVZ pictures of the nests of North American breeding bird species are available at, or researchers can contact us for particular digital images.

Cliff Swallow
Cliff Swallow Nest

Brewer's Sparrow Nest

Bird Study Skins

The WFVZ houses more than 55,000 study skin specimens representing over 100 countries, with the largest numbers of specimens from the United States (>12,900), Mexico (>12,600), Malaysia (>4,400), Costa Rica (>4,000), and Ecuador (>3,800). The skin collection is at least the 16th largest among North American collections.

Rose-bellied Buntings (Passerina rositae)
Rose-bellied Buntings (Passerina rositae)

The primary sources for specimens currently are wildlife rehabilitation organizations; wildlife research agencies; birds killed by cats, window strikes, and car impacts; and the Foundation’s own field research projects.  Materials are consistently acquired by the Western Foundation and used by researchers, educators, scientific artists, and other museums.  In addition, materials are used in educational tours and presentations for the general public, both at the Foundation and at outside events.

Skin loans are made to qualified researchers. Please see our Loan Policies page, and our List Of Services PDF.

Teaching Materials

The WFVZ houses more than 600 mounted bird specimens, and more than 4,500 "no-data" teaching specimens (skins, wings, egg sets, and nests) that we loan temporarily to local educators for their use in the classroom. Our live-mounts of birds are used primarily during our public tours and tours for school and civic groups. We also have available a "teaching kit" that includes background information on 5 different avian science topics (for middle and high school students), a checklist of the birds of Ventura County, and nest, egg, and study skin specimens. All teaching material loans are free. Contact us for more information.