Territory size is similar or occasionally slightly greater than great horned owl&colon; averaging . Small rodents form the great majority of great horned owl prey by number. A more typical top lifespan of a great horned owl is approximately 13 years. In captivity, the record for the longest lived great horned owl was 50 years. The great horned owl is generally colored for camouflage. The great horned owl is the provincial bird of Alberta. Undoubtedly the most dangerous American predator is the great horned owl. The great horned owl rarely misses an opportunity to hunt reptiles and amphibians. The great horned owl is not considered a globally threatened species by the IUCN. In Pennsylvania, the chief predator of eastern cottontails is the great horned owl. Like most owls, the great horned owl makes great use of secrecy and stealth. The great horned owl occupies a similar ecological niche nocturnally to the red-tailed hawk.