Length (mm) of exposed culmen and tarsus, and body mass (kg) of Great Blue Herons. Standard deviation and sample size appear in parantheses. Data from British Columbia: Simpson (1984); Nova Scotia and eastern North America: Quinney & Smith (1979); Oregon: Bayer (1981c).

LocationExposed culmen (mm)Tarsus (mm)Body Mass (kg)
British Columbia
Adult Male137.0 (4.4, 24)165.9 (6.7, 24)2.48 (0.29, 24)
Adult Female123.9 (4.7, 29)152.0 (7.0, 29)2.11 (0.34, 29)
Nova Scotia
Adult Male141.2 (8.6, 9)178.7 (11.6, 16)No data
Adult Female136.5 (5.3, 13)170.8 (12.2, 15)No data
Eastern Canada & U.S.
Adult Males and FemalesNo dataNo data2.23 (0.76, 37)
Oregon
AdultNo dataNo data2.09 (0, 1)
Juvenile (July)No dataNo data1.76 (0.29, 4)
Juvenile (Aug–Dec)No dataNo data1.98 (0.50, 4)
Yearling (Jun–Jan)No dataNo data2.22 (0.40, 3)