Iowa Breeding Bird Atlas

From 2008 to 2012 Iowa conducted its second Breeding Bird Atlas project.

The first atlas project was conducted from 1985 through 1990 and new data shows us range expansions and contractions over the past 20+ years. During this time the landscape changed with the use of CRP increasing our grasslends.


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Success stories

Henslow's Sparrow, a threatened species in the state, is no doubt the greatest success story in Iowa's breeding birds. Increased grasslands have made a huge difference.


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Explore what we learned

  • Species Accounts

    Compare statewide distribution maps between BBA 1 and BBA 2.

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  • Block Summary

    View an interactive chart of all blocks, the effort, and the species recorded.

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  • Effort &Volunteers

    Congratulate our many volunteers without whom this survey would never have been completed.

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