Programming Chrome Apps

Colophon

The animal on the cover of Programming Chrome Apps is a crested screamer. The crested screamer or southern screamer (Chauna torquata) lives in wetlands, estuaries, and swamps in Peru, Bolivia, Paraguay, Brazil, Uruguay, and Argentina. This big bird weighs up to 11 pounds and can measure up to 3 feet long.

The crested screamer is a nonmigratory bird that flocks in large groups. A couple will be monogamous, either seasonally or, more typically, for life. Both parents build a nest near water where they lay two to seven eggs in a clutch and incubate them together for 43 to 46 days. The fledging period for a young bird lasts 8 to 14 weeks.

The crested screamer’s call is reported to be audible from a distance of up to two miles, a quality that gives this bird its name. It has air sacs under its skin that are believed to keep it warm. The birds’ unappetizing flavor and texture make them infrequent prey. Bony spurs of up to two inches in length on mature birds are located on the inner side of each wing; single males are known to use them to vie successfully for females, and both sexes use them to protect their territory and win fights with other couples.

Many of the animals on O’Reilly covers are endangered; all of them are important to the world. To learn more about how you can help, go to animals.oreilly.com.

The cover image is from Wood’s Illustrated Natural History. The cover fonts are URW Typewriter and Guardian Sans. The text font is Adobe Minion Pro; the heading font is Adobe ...