Heron

A patient hunter

The great blue heron’s hunting technique is stillness, then explosion. The bird wades into shallow water and stands motionless — sometimes for 20+ minutes — waiting for fish to pass within striking range. When prey is in position, the heron strikes:

• Speed: roughly 100 ms from start of strike to capture.
• Mechanism: a specialized S-curve neck that uncoils explosively.
• Target: fish, frogs, small mammals, snakes, ducklings, insects — opportunistically wide diet.

The strike is so fast and accurate that herons rarely need second attempts.

Where they live

Great blue herons are remarkably adaptable:

• Coastal estuaries and salt marshes
• Freshwater lakes and slow rivers
• Suburban ponds including golf courses
• Mangrove swamps in Florida and the Caribbean
• Mountain lakes at moderate elevations

They’ve expanded into urban areas where fishing is good and human disturbance is moderate. Many cities now have established heron populations at city parks and reservoirs.

Heronries

Herons nest in colonies (heronries) — sometimes hundreds of nests in a single grove of tall trees. The colonial nesting offers safety from predators and information sharing about food sources. Heronries can persist for decades on the same site.

The trees in active heronries often die from accumulated guano; abandoned heronries can leave entire groves of dead trees.

Other heron species

The Ardeidae family includes about 64 species:

• Great egret — pure white, slim, large.
• Snowy egret — smaller white, with yellow feet.
• Cattle egret — small white, follows livestock for disturbed insects.
• Black-crowned night heron — short and stocky, hunts at night.
• Reddish egret — wildly active hunter, runs and dances.
• Bittern — secretive marsh dweller, with cryptic streaked plumage.

The whitest, longest-feathered egrets nearly went extinct in the 19th century when their breeding plumes (aigrettes) were used to decorate hats. Conservation efforts saved them; the National Audubon Society was founded specifically to protect them.