Bumble bees of North America : an identification guide by Paul H. Williams, Robbin W. Thorp, Leif L. Richardson,

By Paul H. Williams, Robbin W. Thorp, Leif L. Richardson, Sheila R. Colla

More than ever sooner than, there's frequent curiosity in learning bumble bees and the severe function they play in our ecosystems. Bumble Bees of North America is the 1st complete consultant to North American bumble bees to be released in additional than a century. Richly illustrated with colour pictures, diagrams, variety maps, and graphs of seasonal task styles, this advisor permits novice naturalists to spot all forty six bumble bee species stumbled on north of Mexico and to appreciate their ecology and altering geographic distributions.

The ebook attracts at the newest molecular study, indicates the big colour version inside species, and publications readers in the course of the many complicated convergences among species. It attracts on a wide repository of information from museum collections and provides cutting-edge effects on evolutionary relationships, distributions, and ecological roles. Illustrated keys let id of colour morphs and social castes.

A landmark book, Bumble Bees of North America units the traditional for publications and the learn of those very important insects.

  • The most sensible consultant but to the forty six well-known bumble bee species in North the United States north of Mexico
  • Up-to-date taxonomy contains formerly unpublished effects
  • Detailed distribution maps
  • Extensive keys establish the numerous colour styles of species

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Additional info for Bumble bees of North America : an identification guide

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60 40 Dec Nov Oct Sep Jul Aug Jun Apr May Mar Jan 0 Feb 20 55 Bombus caliginosus Male Bombus caliginosus. VL sickle-shaped, the back-curved “sickle” short and broad (contrast B. vosnesenskii) less than 2× longer than the breadth of the broadest part and similar in breadth to the adjacent neck of the penis-valve head, the “sickle” flattened and broadly rounded at the tip, gonostylus shorter than broad (contrast B. vosnesenskii), the inner (medial) edge nearly straight, the margin thin with a short indistinct parallel submarginal groove.

800 53 Bombus caliginosus (Frison, 1927) Obscure Bumble Bee Female Bombus caliginosus.

LR right: Worker Bombus impatiens. LR above: above right: Identification Eastern, medium-tongued species. Most similar to B. bimaculatus, B. perplexus, B. vagans, and B. sandersoni (see also B. citrinus, B. variabilis, B. griseocollis, and some B. rufocinctus). 56 inch). Hair short and even. Head length medium with the cheek (oculo-malar area) as long as broad or just shorter than broad (contrast B. griseocollis, B. rufocinctus), midleg basitarsus with the back far corner rounded, hindleg tibia outer surface flat without long hair but with long fringes 59 Queen worker Worker Bombus impatiens.

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