Frequently Asked Questions About the Great Blue Heron

Where will I most likely find Great Blue Herons?

Great Blue Herons are found near virtually any body of water—lakes, rivers, marshes, coastal areas, and even suburban ponds—across most of North America. They’re wading birds that hunt in shallow water, so look for them standing motionless along shorelines or walking slowly through the shallows. They’re solitary hunters, though you might see several birds fishing in the same productive area.

At Rockefeller State Park Preserve in Pleasantville, NY, great blue herons are seasonal visitors that return when the ice clears in spring. It’s winter now, and Swan Lake has been frozen over for more than two months. But when spring finally gets here, and Swan Lake clears of ice, migrating ducks and other waterbirds will once again call Swan Lake home—and one of my favorite waterbirds is the great blue heron. Great blue herons spend time on the shores of Swan Lake and can be found hunting at the end of the lake with the dam, and also at the narrow end of the lake. I’ve also seen them in the Pocantico River near both the steel and arched bridges.

What’s on the menu, and how does it find food?

Great Blue Herons are opportunistic carnivores feeding primarily on fish, but they’ll also take frogs, salamanders, snakes, small mammals, insects, and occasionally small birds. They hunt by standing motionless in shallow water or walking very slowly, watching for prey. I’m impressed by their patience when hunting for their meals. They can stay still in the water for a long time, observing the fish swimming around them. When they are getting ready to strike, they stretch out their long necks over their prey. At the right time, they plunge their heads into the water and come up with a fish, many times a sunfish. They position the fish head first in their long beaks and promptly swallow the whole fish almost at once. They often go back to hunting for another fish.

What should I look for when trying to find Great Blue Herons?

Great Blue Herons are tall, unmistakable wading birds standing about 4 feet tall with a wingspan of 6 feet. Look for blue-gray plumage, a white head with a black stripe extending from the eye to a plume on the back of the head, a long yellowish bill, and long legs. In flight, they’re distinctive—they fly with slow, deep wingbeats and their neck tucked in an S-curve (unlike cranes, which fly with necks extended). Don’t confuse them with the smaller Green Heron or the all-white Great Egret, though you might see these species in similar habitats.

What interesting behaviors might I observe?

Great blue herons are really majestic when they take off and fly over Swan Lake, their wingtips sometimes touching the water. Watch for their distinctive hunting stance—perfectly still, neck coiled and ready to strike in a fraction of a second. After catching prey, they’ll often shake it to stun it before swallowing it whole, head-first. During breeding season, you might witness elaborate courtship displays with neck stretching, bill snapping, and plume displays. They’re usually solitary hunters but nest colonially in tall trees, returning to the same rookeries year after year.

What personality traits define this species?

Patient, methodical, and solitary. Great Blue Herons embody the phrase “patience is a virtue.” They can stand motionless for extended periods, completely focused on their prey. They’re not particularly social outside of breeding colonies and will defend prime fishing spots from other herons. They’re wary but not overly fearful of humans, maintaining a comfortable distance. Once disturbed, they typically fly to another spot rather than just moving a few feet away.

What are some tips when photographing this bird?

The most important thing when finding and photographing great blue herons is to approach slowly and be patient. Watch how the bird is reacting to its surroundings and whether it’s simply resting (head forward) or hunting (head down). If you see the great blue heron stretch out its neck over the water, you may have a chance to see it catch a fish—be ready with your camera set for fast action. I’ve been able to capture great blue herons at rest, flying, and eating, and I’m always amazed by this bird. Early morning and late afternoon light creates beautiful reflections on the water and side-lights the bird’s plumage. Position yourself low to get eye-level shots. For flight shots, track them as they take off—they’re slow and predictable flyers, making them easier to photograph than many birds.

Photography tips for Rockefeller State Park Preserve:

Spring through Fall: Focus on Swan Lake—particularly the end with the dam and the narrow end of the lake where herons hunt regularly. The Pocantico River near both the steel and arched bridges also offers excellent opportunities.

Hunting behavior: When you see a heron with its head down, it’s actively hunting—be patient and ready. When the neck stretches out over the water, a strike is imminent.

Flight opportunities: Watch for herons taking off from Swan Lake—their slow, graceful flight with wingtips sometimes touching the water creates spectacular images.

Patience pays off: Move slowly, stay quiet, and give the bird space. Great blue herons will tolerate your presence if you’re not threatening, allowing extended observation and photography sessions.

Winter: I’m looking forward to Swan Lake’s ice melting and seeing great blue herons again—their return is a sure sign that spring has arrived at the preserve.

What does this bird sound like?

Great Blue Herons aren’t particularly vocal, but when they do call, it’s memorable—a harsh, croaking “frahnk” or “kraak” that sounds prehistoric. You’re most likely to hear this when they’re startled and take flight, or during interactions at rookeries. The sound is deep, guttural, and carries well across water. It’s not melodious like songbirds, but it perfectly suits this ancient-looking bird.

When does this bird nest, and what should I know about its breeding behavior?

Great Blue Herons nest colonially in rookeries, typically in tall trees near water. They begin nesting early—February through May in most areas—building large platform nests of sticks that they reuse and add to year after year. Both parents incubate 3-6 pale blue eggs for about 28 days. Nestlings are fed regurgitated fish and take their first flight at about 60 days old. Rookeries can be quite noisy and smelly, with dozens to hundreds of nests in close proximity. If you locate a rookery, observe from a respectful distance to avoid disturbing the colony.

What are the challenges Great Blue Herons face in the habitat?

Habitat loss and water pollution are the primary threats, as these birds depend on healthy aquatic ecosystems. Contaminated fish can accumulate toxins in herons through bioaccumulation. Human disturbance at rookeries can cause nest abandonment. During severe winters, herons may struggle to find open water and sufficient food. Power lines pose a collision risk, especially for young birds. Despite these challenges, Great Blue Herons are widespread and common, and their populations are generally stable.

How close can I get without disturbing it?

Great Blue Herons are wary birds with a comfort zone of about 100-200 feet. Approach slowly, indirectly (don’t walk straight at them), and stop frequently. If the bird stops feeding, raises its crest, or changes its posture to face you, you’re getting too close. A telephoto lens (at least 400mm equivalent) is essential for quality photos without disturbance. If a heron flushes (flies away), you got too close—note that distance and stay farther back next time. Never approach active nests—observe rookeries from at least 300 feet away.

What’s a common myth or misconception about this species?

Many people think Great Blue Herons and cranes are the same bird. While both are large and long-legged, herons fly with their necks pulled back in an S-curve, while cranes fly with necks extended. Another misconception is that they only eat fish—they’re actually opportunistic and will take mammals, reptiles, and even other birds. Some people are surprised to learn these birds are quite common; because they’re solitary and wary, they seem rarer than they actually are. Finally, many assume they migrate long distances, but while northern populations do migrate, many herons in temperate climates are year-round residents, moving only short distances to find open water.

Fun fact:

Great Blue Herons have specialized neck vertebrae that allow their neck to form a tight S-curve, which acts like a spring-loaded mechanism for lightning-fast strikes—their heads can shoot forward at speeds up to 25 mph! Their digestion is incredibly efficient, producing pellets of undigested bones, scales, and fur similar to owls. Despite their large size, they’re surprisingly light—weighing only 5-6 pounds—because they have hollow bones adapted for flight. The oldest known wild Great Blue Heron lived to be 24 years old!