Bird Fact Friday – All for one and one for all

From page 102 of The Crossley ID Guide: Raptors:

Harris Hawks, distinctive raptors of the arid Southwest, are the only type of hawk to hunt cooperatively. In fact, the hunting tactics of the Harris Hawk are among the most complex and unique of any bird. Groups usually consist of a pair of dominant adults assisted by several immature or adult birds, often offspring but occasionally other nesting pairs.

The Crossley ID Guide: Raptors
Richard Crossley, Jerry Liguori, Brian Sullivan

The Crossley ID GuidePart of the revolutionary Crossley ID Guide series, this is the first raptor guide with lifelike scenes composed from multiple photographs—scenes that allow you to identify raptors just as the experts do. Experienced birders use the most easily observed and consistent characteristics—size, shape, behavior, probability, and general color patterns. The book’s 101 scenes—including thirty-five double-page layouts—provide a complete picture of how these features are all related. Even the effects of lighting and other real-world conditions are illustrated and explained. Detailed and succinct accounts from two of North America’s foremost raptor experts, Jerry Liguori and Brian Sullivan, stress the key identification features. This complete picture allows everyone from beginner to expert to understand and enjoy what he or she sees in the field. The mystique of bird identification is eliminated, allowing even novice birders to identify raptors quickly and simply.

Comprehensive and authoritative, the book covers all thirty-four of North America’s diurnal raptor species (all species except owls). Each species is featured in stunning color plates that show males and females, in a full spectrum of ages and color variants, depicted near and far, in flight and at rest, and from multiple angles, all caught in their typical habitats. There are also comparative, multispecies scenes and mystery photographs that allow readers to test their identification skills, along with answers and full explanations in the back of the book. In addition, the book features an introduction, and thirty-four color maps accompany the plates.

Whether you are a novice or an expert, this one-of-a-kind guide will show you an entirely new way to look at these spectacular birds.

Fun Fact Friday: Thanatosis and Batesian Mimicry (Don’t Worry, We’ll Explain)

Happy Friday, everybody! It’s time for our next installment of Fun Fact Friday, with Arthur V. Evans’s latest book, Beetles of Eastern North America.

This week’s post is dedicated to (drumroll, please)…the art of playing dead.

8-13 Beetles

Did you know?

Thanatosis, or death feigning, is a behavioral strategy “employed by hide beetles (Trogidae), certain fungus-feeding darkling beetles (tenebrionidae), zopherids (Zopheridae), weevils (Curculionidae), and many others” to avoid becoming a predator’s dinner. When these beetles sense danger, they pull their legs and antennae up tightly against their bodies so that they look dead and lifeless to their enemies. These small predators lose interest in the hard, small, and unflinching beetles, and move on to their next target. Pretty cool, huh?

Batesian Mimicry is another tactic to keep from being eaten. In this case, beetles “mimic the appearance or behavior of stinging or distasteful insects,” as in the case of the flower-visiting Acmaeodera (Buprestidae), scarabs (Scarabaeidae), and longhorns (Cerambycidae). They all sport fuzzy bodies, bold colors and patterns, and behaviors to make them believable mimics of bees and wasps, and make quick and jerky movements to complete the staging. And believe you, me, neither animals nor humans want to be stung by bees – and so the predators retreat.

We hope you feel informed, and we’ll see you next Friday for another great Fun Fact!
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Arthur V. Evans is the author of:

Evans_Beetles Beetles of Eastern North America by Arthur V. Evans
Paperback | 2014 | $35.00 / £24.95 | ISBN: 9780691133041 | 560 pp. | 8 x 10 | 1,500+ color illus. 31 line illus. | eBook | ISBN: 9781400851829 | Reviews  Table of Contents  Preface[PDF]  Sample Entry[PDF]