Búho Americano vs Mochuelo de Parker

The Great Horned Owl is a large, powerful owl with prominent ear tufts, while the Subtropical Pygmy-Owl is much smaller and lacks these tufts. These size and structural differences are the most reliable field marks when distinguishing between the two species.

1. Size: The Great Horned Owl is much larger than the Subtropical Pygmy-Owl. 2. Ear Tufts: Look for the prominent ear tufts of the Great Horned Owl, absent in the Subtropical Pygmy-Owl. 3. Plumage: Note the mottled appearance of the Great Horned Owl compared to the more uniform brown of the Subtropical Pygmy-Owl.

The Great Horned Owl is significantly larger than the Subtropical Pygmy-Owl, which is much smaller and more compact.

The Great Horned Owl has prominent ear tufts and a mottled brown and gray plumage, while the Subtropical Pygmy-Owl lacks ear tufts and has a more uniform brown coloration.