Hymenoptera of America North of Mexico

Hymenoptera of America North of Mexico
Title Hymenoptera of America North of Mexico PDF eBook
Author
Publisher
Pages 316
Release 1951
Genre Hymenoptera
ISBN

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Hymenoptera of America North of Mexico

Hymenoptera of America North of Mexico
Title Hymenoptera of America North of Mexico PDF eBook
Author Karl V. Krombein
Publisher
Pages 308
Release 1958
Genre Hymenoptera
ISBN

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Hymenoptera of America North of Mexico

Hymenoptera of America North of Mexico
Title Hymenoptera of America North of Mexico PDF eBook
Author United States. Entomology Research Division
Publisher
Pages 318
Release 1958
Genre Hymenoptera
ISBN

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A Revision of the Bembicine Wasps of America North of Mexico ...

A Revision of the Bembicine Wasps of America North of Mexico ...
Title A Revision of the Bembicine Wasps of America North of Mexico ... PDF eBook
Author John Bernard Parker
Publisher
Pages 170
Release 1917
Genre Bembecidae
ISBN

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Revision of the Subfamily Macrocentrinae (Hymenoptera:Braconidae) in America North of Mexico

Revision of the Subfamily Macrocentrinae (Hymenoptera:Braconidae) in America North of Mexico
Title Revision of the Subfamily Macrocentrinae (Hymenoptera:Braconidae) in America North of Mexico PDF eBook
Author Kenneth Roger Ahlstrom
Publisher
Pages 284
Release 2005
Genre Braconidae
ISBN

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A Field Guide to the Insects of America North of Mexico

A Field Guide to the Insects of America North of Mexico
Title A Field Guide to the Insects of America North of Mexico PDF eBook
Author Donald Joyce Borror
Publisher
Pages 458
Release 1970
Genre Nature
ISBN 9780395185230

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Text and pictures combine to present 579 insect families.

Status of Pollinators in North America

Status of Pollinators in North America
Title Status of Pollinators in North America PDF eBook
Author National Research Council
Publisher National Academies Press
Pages 327
Release 2007-05-13
Genre Technology & Engineering
ISBN 0309102898

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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.