Great horned owls look larger than many people expect because they have a bulky body, wide wings, large head, and tall feather tufts. Their real size is impressive but not eagle-sized. This article explains the average great horned owl size, wingspan, weight, male vs female differences, human comparison, nest and egg size, and how they compare with other large birds.
Great Horned Owl Size Overview
A great horned owl is a large, powerful owl with a body length of about 18.1–24.8 inches, a weight of 32.1–88.2 ounces, and a wingspan of 39.8–57.1 inches. That means its wingspan can reach almost 5 feet across. Females are usually larger and heavier than males.
| Measurement | Great horned owl size |
| Body length | 18.1–24.8 in / 46–63 cm |
| Wingspan | 39.8–57.1 in / 101–145 cm |
| Weight | 32.1–88.2 oz / 910–2,500 g |
| Size in feet | About 1.5–2.1 ft long |
| Wingspan in feet | About 3.3–4.8 ft wide |
Great Horned Owl Size Compared to a Human
Next to a human, a great horned owl is not very tall, but it looks broad and powerful. Its body length is only about 1.5–2 feet, so a perched owl is much shorter than an adult person. However, when it opens its wings, the wingspan may stretch nearly as wide as a small adult’s shoulder-to-shoulder arm reach.
Why It Looks So Big
A great horned owl appears larger because of:
- Wide wings
- Large round head
- Thick feathers
- Upright posture
- Long “horn” feather tufts
- Bright yellow eyes
Its feather tufts are not real horns or ears. They display feathers that help give the owl its fierce, horned look.
Great Horned Owl Wingspan
The great horned owl wingspan is one of its most noticeable size features. It usually ranges from about 40 to 57 inches, or roughly 3 feet 4 inches to 4 feet 9 inches. This wide wingspan helps the owl fly quietly, glide between trees, and attack prey with control.
Wing Size and Hunting
The wings are broad rather than narrow. This shape helps the owl fly slowly and silently through forests, fields, wetlands, and suburban areas. Great horned owls often hunt from a perch, then drop down quickly onto prey instead of chasing it for long distances.
Great Horned Owl Weight and Body Build
A great horned owl usually weighs about 2–5.5 pounds. This may sound light compared with a dog or cat, but for an owl, it is a strong and heavy body. Females are commonly heavier than males, which is normal in many birds of prey.
Male vs Female Size
Female great horned owls are generally larger than males. A female may have a heavier body and slightly broader wings, while males are often smaller but still powerful hunters. This difference is called reverse sexual size dimorphism, which is common in many raptors.
Great Horned Owl Size Comparison With Other Birds
Great horned owls are larger and heavier than barred owls and barn owls, but they are smaller than bald eagles. Snowy owls and great gray owls may match or exceed them in some measurements, depending on the individual bird.
| Bird | Length | Wingspan | Weight |
| Great horned owl | 18.1–24.8 in | 39.8–57.1 in | 32.1–88.2 oz |
| Barred owl | 16.9–19.7 in | 39.0–43.3 in | 16.6–37.0 oz |
| Barn owl | 12.6–15.8 in | 39.4–49.2 in | 14.1–24.7 oz |
| Snowy owl | 20.5–27.9 in | 49.6–57.1 in | 56.4–104.1 oz |
| Great gray owl | 24.0–33.1 in | 53.9–60.2 in | 24.7–60.0 oz |
| Bald eagle | 27.9–37.8 in | 80.3 in | 105.8–222.2 oz |
Barred Owl vs Great Horned Owl Size
The barred owl is also a large owl, but the great horned owl is usually heavier and more powerful. Barred owls have a shorter wingspan range and much lower average weight than great horned owls.
Barn Owl vs Great Horned Owl Size
A barn owl can have a surprisingly wide wingspan, but its body is much lighter and slimmer. A great horned owl has a heavier build, stronger feet, and a more muscular appearance.
Great Horned Owl vs Bald Eagle Size
A bald eagle is much larger than a great horned owl in wingspan and weight. A bald eagle’s wingspan is about 80 inches, while a great horned owl’s maximum listed wingspan is about 57 inches.
Great Horned Owl Talon Size and Strength
Great horned owls are famous for strong feet and sharp talons. Their talons are used to grab rabbits, rodents, birds, skunks, and other prey. Exact talon size can vary, but the key point is strength: their feet are powerful enough to hold struggling prey tightly.
Why Talons Matter More Than Body Size
A great horned owl is not huge compared with an eagle, but its hunting power comes from:
- Strong gripping feet
- Sharp curved talons
- Silent flight
- Night vision
- Surprise attacks
This is why a bird weighing only a few pounds can still be a serious predator.
Great Horned Owl Nest Size
Great horned owls usually do not build their own nests from scratch. They often reuse old nests made by hawks, crows, ravens, or squirrels. They may also nest on cliffs, tree cavities, ledges, or artificial platforms. Their clutch is usually 1–4 eggs, and each egg is about 2.1–2.2 inches long and 1.8–1.9 inches wide.
Great Horned Owl Egg Size
Great horned owl eggs are dull white and nearly round. Compared with small songbird eggs, they are large and thick-looking, but they are still much smaller than chicken eggs in overall volume.
Baby Great Horned Owl Size
Baby great horned owls hatch helpless, with closed eyes and white down. They grow quickly and usually remain in the nest for several weeks. Cornell lists the nestling period at about 42 days, after which young owls begin moving out of the nest and learning to fly.
Great Horned Owl Territory Size
Great horned owl territory size can vary widely by habitat, prey supply, season, and nesting conditions. A pair in prey-rich habitat may use a smaller area, while owls in open or poor habitat may hunt over a larger range. Territory is not only about size; it must include safe nesting places, hunting perches, and enough prey.
FAQs
What is the average size of a great horned owl?
The average great horned owl is about 18–25 inches long, with a wingspan of about 40–57 inches. Its weight usually ranges from about 2 to 5.5 pounds. Females are typically larger than males.
How big is a great horned owl compared to a human?
Compared to a human, a great horned owl is short in body height but wide in wingspan. Its body is only about 1.5–2 feet long, but its wings can spread nearly 5 feet across.
Is a great horned owl bigger than a barred owl?
Yes, a great horned owl is usually bigger and heavier than a barred owl. Barred owls can look similar in body size, but great horned owls have a heavier build, stronger feet, and a wider maximum wingspan.
Is a snowy owl bigger than a great horned owl?
A snowy owl is often larger or heavier than a great horned owl. Snowy owls can reach 20.5–27.9 inches long and weigh up to 104.1 ounces, while great horned owls usually reach up to 88.2 ounces.
What size is a great horned owl egg?
A great horned owl egg is about 2.1–2.2 inches long and 1.8–1.9 inches wide. The eggs are dull white, almost round, and usually laid in a clutch of 1–4 eggs.
