Birders rely on guides, handbooks, and lists to locate birds and then keep track of the birds they have observed. So these documents provide a record of a bird species’ existence.
In this post, I note a dozen lesser-known guides, handbooks, and lists that include the California condor. Among these are 2 journal articles, 10 books, and 2 different editions of the same author’s work. One of the books is organized around locales rather than species.
Continue reading “More guides, handbooks & lists: 1959-2013” →
To tell the story of the California condor, some authors have stepped into the mind of a bird. This post looks at 5 examples.
Continue reading “A bird’s perspective” →
Here, from reliable sources, are some lesser-known facts about the California condor.
Continue reading “Who knew?” →
Protecting the California condor from extinction is about biology, right?
That is true only if you consider mathematics to be an essential part of biology.
This post notes 3 older examples of insights provided by mathematics into the plight of the California condor. These examples all date from the time when the condor’s future was especially bleak.
Continue reading “Insights from mathematics” →
Consider a 25 pound (10 kg) bird with 10 feet (3 m) of wings passing through the air. Is there a sound to be heard? What is that sound?
This post quotes 8 historical reports of the sound of the flight of the California condor.
Continue reading “The sound of flight” →