AMERICAN ROBIN

American Robin
Copyright © 2005 Eric Secker

Conservation Concern: NONE

Population Trend: Substantial Decrease
Credibility: Very Good

The American Robin is an abundant statewide breeder in open woodlands, forest edges, shrublands, urban areas or almost anywhere with shrubs or trees. Although BBS trends indicate that this species is increasing in the upper Midwest, BCN ebird trends indicate a significant decline in the CW Region. However, this species is still abundant. Populations in residential areas are also poorly sampled by the BCN Census.

Trend Level

Interpreting the Data | Analysis Methods | Disclaimer | Contact Us

Avg. Yearly
Rate of Change:

The vertical axis numbers represent an index of the population change.

Note that the scales may vary between graphs.

Avg. Yearly
Rate of Change*:

-8%

-3%

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 1981

Sample Size (Records): 970

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-12 to -4

GOODNESS OF FIT:
Chi-square: 831.69, df 781, p 0.1016
Likelihood Ratio: 930.44, df 781, p 0.0002
AIC: -631.56
NOTE: (model fits if p values are above 0.05)

Download Table of All Observations

Project Affiliates and Sponsors:



1997-2004 Trend Point Count Data	1988-2004 Trend* All Observation Types