The great grey owl (Strix nebulosa) is a striking bird known for its impressive appearance, often leading to a perception of immense size. This owl, found across the Northern Hemisphere, captivates observers with its large, rounded head and distinctive facial patterns. Understanding its actual dimensions in relation to a human provides a clearer picture of this magnificent raptor.
Physical Dimensions of the Great Grey Owl
The great grey owl is one of the tallest owl species in North America, possessing broad wings and a long tail. Its length ranges from 61 to 84 centimeters (24 to 33 inches). Females are slightly larger than males, with an average length of 72 cm (27 inches) compared to 67 cm (26 inches) for males.
The wingspan of a great grey owl can reach over 152 cm (60 inches), with averages around 142 cm (56 inches) for females and 140 cm (55 inches) for males. Despite its considerable length and wingspan, this owl is surprisingly light, with an adult weight ranging from 700 to 1800 grams (1.5 to 4 pounds).
Comparing the Owl’s Size to a Human
When comparing the great grey owl to a human, its height is equivalent to that of a small child or reaching an adult’s waist. A 61 to 84 cm owl stands as tall as a 2 to 3-year-old child. Its wingspan, which can exceed 1.5 meters (5 feet), is comparable to a person stretching their arms out wide.
Imagine a person standing with arms outstretched; the owl’s wings could span that entire distance. While its length is notable, its weight of 700 to 1800 grams (1.5 to 4 pounds) is relatively light for its apparent size, similar to a small housecat or a bag of flour.
Understanding the Owl’s Apparent Size
The great grey owl appears much larger than its actual body mass suggests, a phenomenon due to its dense and fluffy plumage. This owl is covered in numerous layers of long feathers, creating an illusion of greater bulk. The feathers provide insulation in cold northern climates, but also contribute to its overall visual presence without adding much weight.
The owl’s large, round head and prominent facial disc further enhance this perception of size. The facial disc is composed of specialized feathers that help direct sound to its ears, aiding in hunting. This broad, flat face, combined with the extensive feathering, makes the owl appear more substantial than its slender body underneath.