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Bird Glossary - Irruption

Guest Author - Lisa Shea

An irruption is when a large group of birds expands its normal range area because there isnīt enough food to feed them.

This normally happens after breeding season, when the young birds are becoming self sufficient. This normally happens to birds that are pretty picky about what they eat, and who eat things that tend to become available in cycles.

Some birds in north America that are prone to irruptions are the chickadee, nuthatch, blue jay, evening grosbeak, and red crossbill.

Birding Glossary
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Content copyright © 2013 by Lisa Shea. All rights reserved.
This content was written by Lisa Shea. If you wish to use this content in any manner, you need written permission. Contact BellaOnline Administration for details.

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