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Nest dimensions (cm) for the American Robin from 5 geographic regions (sample size in parentheses following location name). Data given as mean ± SE (range).

LocationOutside diameterOutside heightInside diameterInside heightSource
New York (6)14.2 ± 1.5 (8.8–20.0)11.3 ± 1.8 (8.8–20.0)8.7 ± 0.4 (6.9–9.7)5.8 ± 0.2 (5.5–6.5)Howell 1942
Manitoba (11)15.5 ± 0.3 (14.0–18.0)10.2 ± 0.4 (8.5–13.0)8.8 ± 0.3 (7.5–10.5)6.0 ± 0.1 (5.0–6.5)J. V. Briskie unpubl. data
Idaho (102)13.8 ± 0.2 (10.0–19.0)11.3 ± 0.3 (4.0–27.0)9.2 ± 0.1 (5.0–11.5)6.0 ± 0.1 (3.0–13.0)RS
Montana (16)13.3 ± 0.6 (9.5–18.5)12.4 ± 1.1 (8.0–24.0)9.1 ± 0.5 (3.0–12.7)6.2 ± 0.4 (4.0–9.5)RS
Washington (16)13.9 ± 0.5 (8.0–16.3)10.2 ± 0.6 (6.5–18.0)10.0 ± 0.2 (8.0–11.5)6.5 ± 0.3 (5.0–8.6)RS