Hymenoptera of America North of Mexico PDF Download

Author: Karl V. Krombein
Publisher:
ISBN:
Category : Hymenoptera
Languages : en
Pages : 308

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Author:
Publisher:
ISBN:
Category : Hymenoptera
Languages : en
Pages : 316

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Author: United States. Entomology Research Division
Publisher:
ISBN:
Category : Hymenoptera
Languages : en
Pages : 318

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Author: John Bernard Parker
Publisher:
ISBN:
Category : Bembecidae
Languages : en
Pages : 170

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Author: Kenneth Roger Ahlstrom
Publisher:
ISBN:
Category : Braconidae
Languages : en
Pages : 284

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Author: Donald Joyce Borror
Publisher:
ISBN: 9780395185230
Category : Nature
Languages : en
Pages : 458

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Book Description
Text and pictures combine to present 579 insect families.

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309102898
Category : Technology & Engineering
Languages : en
Pages : 327

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Book Description
Pollinators-insects, birds, bats, and other animals that carry pollen from the male to the female parts of flowers for plant reproduction-are an essential part of natural and agricultural ecosystems throughout North America. For example, most fruit, vegetable, and seed crops and some crops that provide fiber, drugs, and fuel depend on animals for pollination. This report provides evidence for the decline of some pollinator species in North America, including America's most important managed pollinator, the honey bee, as well as some butterflies, bats, and hummingbirds. For most managed and wild pollinator species, however, population trends have not been assessed because populations have not been monitored over time. In addition, for wild species with demonstrated declines, it is often difficult to determine the causes or consequences of their decline. This report outlines priorities for research and monitoring that are needed to improve information on the status of pollinators and establishes a framework for conservation and restoration of pollinator species and communities.

Author: Canada. Agriculture Canada. Research Branch
Publisher: Canadian Government Publishing
ISBN:
Category : Science
Languages : en
Pages : 688

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This publication is the result of a course on identification of Hymenoptera given three times since 1985 at the Centre for Land and Biological Resources Research. The considerable interest in these courses indicated the need for a comprehensive identification guide to all extant families of Hymenoptera. The main emphasis is on family identification using the keys, which are complemented by family sketches. The sketches include a taxonomic diagnosis to supplement the keys, a summary of the biology, the size and distribution, and important literature references.

Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 168

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Author: H. H. Neunzig
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 128

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Book Description