Herons in Iowa: Where to See Them and How to Identify Them

Your best bet is the Upper Mississippi River National Wildlife Refuge, which stretches along the eastern border and hosts many herons during migration. Prairie potholes in north-central Iowa and the Loess Hills along the Missouri River also consistently hold breeding pairs. For a reliable year-round spot, check out the wetlands at Saylorville Lake near Des Moines. These areas offer shallow water and abundant fish, the main draw for herons. For an overview of statewide birding spots, visit our Iowa wildlife page. In the southern part of the state, the Rathbun Lake area provides excellent habitat with its many quiet coves and surrounding wetlands. Herons are also frequently seen in the Cedar River and Des Moines River corridors as they move through the heart of the state.

Spring, specifically from April to mid-May, and fall, from September to October, bring the highest numbers as migrants pass through. However, herons breed in Iowa from May through July, offering consistent views if you know where to look. Time of day matters significantly: early morning from sunrise to 9 a.m. and late afternoon from 4 p.m. to dusk are when herons are most actively feeding at the water's edge. Midday heat often sends them into the shade of overhanging trees, so plan your outings around those cooler windows for the best odds. During the winter, you may still find a few individuals near open water below dams, though most head south when the lakes freeze over.

The Great Blue Heron is the largest and most common, standing about 4 feet tall with a gray-blue body, a long neck, and a dagger-like bill. It flies with slow wingbeats and its neck folded in a distinctive S-shape, which distinguishes it from cranes that fly with their necks extended straight. Green Herons are much smaller, with a dark crest and a rusty neck, often seen lurking in dense cover near the water. White egrets are all-white with black legs and yellow feet, while the Great White Heron is a color morph found mainly in Florida. For more ID tips, see our heron identification guide.

See our state animal guide for the next step. You can also look for the Black-crowned Night-Heron, which is shorter and stockier with a black back, often becoming active just as the sun goes down.

Herons are strictly tied to water for their survival. They need shallow water for wading and hunting fish, amphibians, and large insects. Marshes, swamps, river edges, lake shores, and even flooded farm fields all work as habitat, as long as there is sufficient cover nearby for nesting. Great Blue Herons often nest in large colonies called rookeries, usually in dead trees or tall willows near the water. Green Herons favor smaller, wooded streams and ponds with overhanging branches where they can hide while waiting for prey. If you see a tall bird standing perfectly still at the edge of a cattail marsh, it is almost certainly a heron waiting for a meal to swim by.

Beyond the Great Blue, you will regularly see Green Herons and Black-crowned Night-Herons. The night-heron is stocky with a black back and cap, often seen at dusk or heard calling during the night. Less common visitors include the Little Blue Heron, which is all dark as an adult and white as a juvenile, and the Tri-colored Heron, which occasionally drifts north during the summer. During the spring migration, keep an eye out for the Cattle Egret in fields near livestock, as they follow tractors and cattle to catch insects. Most of these species are easiest to find in the state's southern half where the climate is slightly milder. Check our Iowa wildlife page for seasonal checklists.