Accipitridae (Hawks and Eagles)

Accipitridae (Hawks and Eagles)

Accipitridae is a family of diurnal birds of prey, including hawks, eagles, and related raptors. Members of this family are recognized by a combination of powerful talons, strongly hooked bills, and broad wings adapted for soaring or maneuvering flight.

They are most often associated with woodlands, shorelines, wetlands, and open country, where they may be seen perched in elevated positions or circling overhead while scanning for prey.

In the field, they are frequently identified by shape, movement, habitat, and flight behavior as much as by plumage.

Orientation

These notes emphasize field recognition, behavior, and comparison across species, rather than a complete taxonomic treatment.

General Characteristics

• Size: medium to very large (varies widely across species)
• Bill: heavy, hooked, and adapted for tearing flesh
• Plumage: generally brown, gray, or mottled; limited bright coloration; juveniles often differ significantly from adults
• Voice: typically sparse; calls are sharp, piercing, or whistled
• Flight: broad wings; soaring, gliding, and steady wingbeats common

Habitat and Range

Members of this family are most often encountered in:

• Lakes and rivers
• Forests and woodland edges
• Open fields and agricultural areas

Seasonal patterns may include:

• Breeding: nesting in tall trees or remote wooded areas
• Migration: many species move seasonally, often following ridgelines or shorelines
• Winter: some species remain where open water or prey is available

Birds are often detected first by movement or silhouette, especially when soaring overhead.

Field Recognition

Key features for identifying this family:

• Shape: broad wings, relatively long tails (varies by species), and a strong, heavy body
• Bill: large and hooked, often visible even at distance
• Plumage: typically subdued; pattern and contrast more important than color
• Movement: soaring, circling, or scanning from perches
• Voice: secondary cue; not frequently heard compared to songbirds
• Behavior: predatory or scavenging; often solitary or in pairs

In many cases, silhouette and flight style are the most reliable field marks.

Movement and Flight

• Flight: long glides interspersed with slow, powerful wingbeats
• Perching: upright posture in exposed or high vantage points
• Foraging: hunting from the air or perch; some species also scavenge
• Display: soaring, circling, or aerial interactions during territorial or courtship periods

Movement patterns are often diagnostic and can allow identification before plumage details are visible.

Similar Families

This family may be confused with:

• Falconidae: faster wingbeats, more pointed wings, and a sleeker build
• Cathartidae: soaring vultures with longer wings and distinct flight posture (dihedral)
• Strigidae: owls, which are primarily nocturnal with broader heads and silent flight

Distinction is often based on flight style, activity period, and structure, rather than plumage alone.

Species

Haliaeetus leucocephalus (Bald Eagle)

A large, unmistakable raptor most often found near water, recognized by its white head and tail and steady soaring flight.

Notes

• Raptors are often widely spaced, with individuals occupying large territories
• Juvenile plumages can complicate identification, especially among hawks and eagles
• Minnesota observations frequently center on lakes, rivers, and forest edges
• Behavior and flight silhouette are critical for identification at distance

References

• Cornell Lab of Ornithology – All About Birds
  https://www.allaboutbirds.org

• eBird
  https://ebird.org

• Birds of the World / regional atlas as needed
  https://birdsoftheworld.org