Species Accounts

Sources

Species Codes - four letter Alpha Code derived from common name as established by Klimkiewicz & Robbins (1978) and adopted in the Bird Banding Manual (1981). (Bird Banding Laboratory)
Breeding Bird Survey Trends - US Fish & Wildlife Service (Breeding Bird Survey)
Common and scientific names are those currently in use by the American Ornithological Society.
Acronyms Used
Literature Citations
About the Authors

The first Breeding Bird Atlas publication, published in 1996, provided in-depth species accounts of Iowa's breeding birds. It is a must read for anyone interested in avian ecology of the state. This sequel uses the data from the latest atlas project to update what we know today. Enjoy comparing the records of different species from BBA I to BBA II. Select a species and get started. Click on a map pin to see the location details. For species with many records and a cluttered map, zoom in a bit for better clarity.

Available as an eBook from Google Play

BBA	Confirmed	Probable	Possible	Observed
BBA I	158	16	10	15
BBA II	166	16	12	2

Guide to Species Accounts

Species Summary

A brief description of the breeding habitat
Breeding dates found during this effort (using only Confirmed and Probable statuses)
A brief description of the nest type
Basic information on expected clutch size, incubation period length, and fledging period
The species’ general status in Iowa
The Breeding Bird Survey linear trend for Iowa including the trend estimate (slope of the line) and 95% confidence interval. Trends are for the period 1966 through 2012 and the graph plots the annual BBS indices during this time period. In a few cases the data were too sparse to estimate an Iowa trend, so we used the Central U.S. regional trend. For a few species there were too few data to estimate a trend with either dataset. (U.S. Geological Survey 2020)
A detailed summary of the primary trends in Iowa since the first Breeding Bird Atlas (BBA I) is provided. This section also highlights important patterns detected during BBA II and often includes references to key published literature on the species.

Data Summary

A summary table of findings from BBA I includes levels of breeding evidence for grid, priority, and all blocks
Statewide distribution of breeding evidence for BBA I - pie chart
Statewide distribution of breeding evidence for BBA I - small map
A summary table of findings from BBA II includes levels of breeding evidence for grid, habitat, and all blocks
Statewide distribution of breeding evidence for BBA II - pie chart
Statewide distribution of breeding evidence for BBA II - map

Iowa BBA II