Red-shouldered Hawk

Overview

The Red-shouldered Hawk (Buteo lineatus) is an elegant, vocal, and highly agile medium-sized raptor belonging to the hawk and eagle family (Accipitridae). Inhabiting the dense canopies of mature bottomland hardwood swamps, river floodplains, and damp deciduous forests of eastern North America and coastal California, this magnificent bird of prey is universally celebrated for its rich rufous-barred underparts, checkered black-and-white wings, and iconic rusty-red lesser secondary coverts. Revered by birders for its loud, piercing, diagnostic ‘kee-ahh’ whistle echoing through the spring woods, the red-shouldered hawk is the quintessential raptor of North American forest wetlands.

Ecologically, Buteo lineatus occupies an indispensable mesopredatory position in riverine and wetland food webs. Unlike the open-country red-tailed hawk, the red-shouldered hawk specializes in navigating dense forest canopies to hunt semi-aquatic prey—consuming enormous numbers of frogs, toads, garter snakes, and crayfish, alongside woodland rodents. In doing so, it stabilizes riparian amphibian and small-mammal populations while serving as an acoustic bioindicator of mature, continuous riverine woodland canopy health.

Biology and Physical Characteristics

The morphology of the Red-shouldered Hawk is exquisitely specialized for maneuvering through crowded forest branches. It possesses shorter, broader, and more rounded wings and a longer, narrower tail than open-country buteos, granting it extraordinary aerodynamic agility akin to a true accipiter. In flight, adults display a distinctive, translucent pale crescent or ‘window’ near the base of the primary flight feathers that glows when backlit against the sky. The breast, belly, and underwing coverts are richly barred in brilliant rufous-orange, while the back and upperwings are dark brown checkered with crisp white spots. The long tail is jet-black, punctuated by three to four narrow, brilliant white bands and a white terminal tip. Its talons are sharp and slender, specialized for snatching slippery frogs and fast-moving snakes from shallow swamp pools, while its large yellow eyes provide exceptional stereoscopic vision in dim forest understories.

Behavior and Ecology

Red-shouldered hawks are sit-and-wait ambush hunters that hunt from low tree perches positioned 5 to 15 feet above the swamp floor or wetland edge. When prey is spotted, the hawk drops silently to the ground in a steep, controlled glide, seizing the target in its talons before returning to a secure branch to feed. In spring, courtship is breathtaking: breeding pairs perform the dramatic ‘sky dance,’ soaring together in wide circles while crying loudly, with the male executing steep vertical dives and swooping ascents before presenting the female with fresh green sprigs of pine or cedar to line their bulky stick nest. Monogamous pairs often return to the same territory and nest tree for years; the female incubates a clutch of two to five speckled eggs for 33 days while the male supplies food, after which both parents vigorously defend the nest, fearlessly dive-bombing approaching raccoons, crows, and humans.

Conservation and Human Impact

Buteo lineatus is evaluated as Least Concern on the IUCN Red List, with North American populations demonstrating strong, steady recovery over recent decades, numbering over 1.9 million individuals. While historic logging of old-growth bottomland hardwood forests and organochlorine pesticide contamination (such as DDT) in the mid-twentieth century severely depressed eastern populations, reforestation and wetland protection laws have allowed it to flourish. Remarkably, red-shouldered hawks have adapted well to mature wooded suburban neighborhoods with large shade trees, though they remain vulnerable to vehicle collisions, secondary rodenticide poisoning from eating poisoned rats, and suburban tree removal destroying critical nest trees.

Interesting Factoid

The piercing ‘kee-ahh’ screech of the red-shouldered hawk is so famous that blue jays have learned to imitate it flawlessly, using the fake hawk scream to terrify other birds away from backyard bird feeders so they can eat all the seeds themselves.