Hawks

Buteo jamaicensis & Accipiter cooperii

Pencil drawing of a red-tailed hawk in flight

Look up on almost any clear day and there’s a good chance a red-tailed hawk is riding the thermals overhead.

A Cooper's hawk perched on a bare branch against a blue sky
A Cooper’s hawk — short rounded wings and a long tail, built for weaving between trees rather than soaring.

Or a smaller Cooper’s hawk is slipping between backyard trees. Hawks have adapted well to suburban life, and their presence is one of the clearest signs of a functioning local food web.

What they look like

Red-tailed hawks are large, broad-winged birds, typically 19 to 25 inches long with a wingspan approaching four feet, best known for the rust-red tail visible from below in adults. Cooper’s hawks, a common backyard visitor, are smaller and built for speed and agility — short, rounded wings and a long tail suited to weaving through trees rather than soaring in open sky. Both show the strong hooked beak and sharp talons typical of raptors.

Family life

Hawks generally mate for life and return to the same territory, and often the same nest, year after year, adding new material each season. Red-tailed hawks typically lay one to three eggs in early spring, built high in a tall tree or, increasingly, on manmade structures like utility poles or building ledges. Incubation lasts about a month, and both parents share feeding duties once chicks hatch.

Young hawks fledge around six weeks old but stay dependent on their parents for several more weeks while learning to hunt. An awkward, still-spotted juvenile struggling with basic flight is normal development, not injury.

Daily habits

Hawks are diurnal, hunting during daylight hours, and diet varies by species. Red-tailed hawks are generalists that take squirrels, chipmunks, rabbits, and other small mammals, while Cooper’s hawks specialise more heavily in birds, including the occasional visitor to a backyard feeder.

A hawk perched motionless for long stretches is typically watching and waiting — an efficient hunting strategy, not a sign of illness.

Territory and range

Red-tailed hawk territories can range from under a square mile in resource-rich areas to several square miles elsewhere, and pairs defend them actively against other hawks, especially during breeding season. Cooper’s hawks hold smaller, denser territories and have become notably more common in suburban and urban neighbourhoods in recent decades, drawn in part by the abundance of songbirds at backyard feeders.

A hidden danger: rodenticide poisoning

Like owls, hawks are highly exposed to secondary rodenticide poisoning because their diet is so rodent-heavy. Multiple regional studies have found the large majority of tested red-tailed hawks carrying anticoagulant rodenticides.

  • Massachusetts. Every one of 43 red-tailed hawks tested at the Tufts Wildlife Clinic between 2017 and 2019 was positive — and 91% carried residues of two to four different rodenticides at once.
  • New York. A 2022 Cornell study found 68% of red-tailed hawks statewide carrying anticoagulant residues, against a 6% baseline recorded in earlier state monitoring.

Because the poison accumulates gradually and a bird can appear outwardly healthy while carrying a significant toxic load, the scale of the problem is easy to underestimate. Choosing snap traps or exclusion over rodenticide is one of the more effective things a resident can do to protect the hawks doing free rodent control nearby.

Murray, M. (2020), Environmental Toxicology and Chemistry; Hopf-Dennis, C. et al. (2022), Ecotoxicology.

Living alongside hawks

  • Skip rodenticide bait. It’s the single biggest hidden threat to local hawks, working its way up the food chain from the rodents they hunt. See the red fox page for ways to reduce rodents without creating a secondary poisoning effect — and more humanely for the rodents.
  • Feeder concerns are natural, not alarming. A Cooper’s hawk hunting near a feeder is behaving normally. Spacing feeders near cover so songbirds have an escape route is a more effective response than trying to deter the hawk.
  • Leave awkward juveniles alone. A young hawk on the ground or low in a tree, still under parental care, usually just needs space and time, not intervention.
  • Preserve tall, mature trees where possible. These remain preferred nesting sites even as the surrounding landscape develops.

A hawk overhead is a sign the local ecosystem still has room for a top predator — and one of the more visible reminders of how much wildness persists in a well-settled town.

Quick facts

Two common species
Red-tailed hawks soar overhead; Cooper’s hawks weave between backyard trees.
Faithful to a nest
Pairs mate for life and reuse the same nest, adding to it each season.
Clumsy juveniles are normal
Fledglings stay under parental care for weeks while learning to hunt.
Rat poison reaches them
100% of red-tailed hawks in one Massachusetts study carried rodenticide.