Juvenile Green Herons: Identification, Babies and the First Year

A juvenile Green Heron is a small, stocky, brown heron with a dark cap, a neck and front streaked brown on buffy white, and pale buff spots and edges on its wing feathers. Young birds just out of the nest often still have wisps of gray down on the head and an orange bill. This page follows the young from hatching to their second year; for adults, calls and range, see the Green Heron guide.

Juveniles are browner than adults. The cap is dark, the whole neck and underparts are streaked brown on buffy white, and the wing feathers have pale buff spots and edges. The legs are yellow.¹

In one late-summer study in Louisiana, 14 immatures averaged 7.7 ounces (219 g), not far below the 8.5 ounces (241 g) of 16 adults.²

An adult has a dark greenish-black cap, chestnut sides to the neck with only a narrow, streaked white stripe down the front (often hidden when the neck is tucked in), gray underparts and a dark bill. A juvenile is streaked all over the neck and front, has pale-spotted wings, and, fresh out of the nest, an orange bill with a dark tip.

Whether young males and females can be told apart was unresolved in the mid-1990s: two early authors said they could, another said not, and the evidence rested on few examples.¹

Over the first winter most young birds replace their body feathers. They stay striped on the neck but get a darker crown and a clean white throat and underparts. By their first summer they look like dull adults, with pale tips on some wing feathers, and by their second year like adults. Molt in Green Herons had not been studied in detail by the mid-1990s, so these stages are approximate.

Green Herons probably first breed at 2 years old, though some may breed at 1: some breeding birds in New York were still in immature plumage.¹

Green Herons usually lay 3 to 5 eggs, and both parents incubate them for 19 to 21 days. Chicks hatch with their eyes open and a crest of grayish-brown down, whiter on the belly. At first they can only lift their heads briefly, but they move about the nest later the same day. A newly hatched chick weighs about half an ounce (16 g), and at a day old it is about 3.75 inches (95 mm) long.¹

They change fast. A chick's bill starts pinkish with a black tip and is orange with a dark tip by about 24 days; its eye turns from pale gray to yellowish white; and its legs are yellow within two weeks. Juvenile feathers start growing at 4 days, cover the body by about 25 days with down left only on the head, and the last down is gone by about 37 days.

Chicks show fear by 4 to 5 days, flap their wings by 7 to 8 days, climb well by the end of the first week, snap at flying insects by 9 days, jump back to the nest from a branch by 15 days and make short flights by 21 days.³ Both parents brood them almost constantly in the first week and less after that. From 9 to 11 days old the chicks are left alone by day, and when approached they freeze in the bittern stance: neck stretched up, feathers sleeked, bill pointing up. Older chicks shuffle back to the rim of the nest to void, and the nest is usually covered in droppings.¹

Their parents feed them by regurgitation: food the adults have swallowed and bring back up. Chicks are first fed at a day old, on food so well digested it is nearly liquid, brought up into the chick's mouth or onto the nest. From about a week old they grab the parent's bill crosswise to take food, and older chicks get larger, less digested items. Later the young are fed 2 to 3 times a day.¹

Chicks beg with a rapid tik-tik-tik from their first day, loudest when a parent arrives at the nest. By 5 days they also give a haa call.

In this recording from a Virginia nesting colony, the begging is a dense, rapid ticking.⁴

The young clamber out of the nest at 16 to 17 days and fly at 21 to 23 days. At first they fly around the nest tree and are fed there two or three times a day, and by about 25 days they follow their parents to the feeding grounds. In the mid-1990s their age at independence had only been estimated, at about 30 to 35 days.

Young Green Herons can swim. A half-grown bird put in water swam about 66 feet (20 m) sitting upright, and fledged young go into the water after prey.¹

After nesting many young birds wander before they migrate. Fledglings banded in summer in Maryland and Virginia were found in October anywhere from Wisconsin to Nicaragua and Puerto Rico.

Young birds crouch on branches or at the water's edge to stalk small fish and frogs, and immature birds have been seen raking the bottom with a foot to stir up prey.¹ Some Green Herons drop bait on the water to lure fish, and one of the North American reports was of an immature bird using a feather as a lure.⁵ In a study of the Striated Heron, the Green Heron's close relative, in Japan, young birds baited poorly.⁶

Black-crowned Night Heron. Its young are much bigger, 23 to 26 inches (58-66 cm), and heavier-bodied, brown with white spots at first. A young Green Heron is much smaller, with a dark cap.

Yellow-crowned Night Heron. Its young are much bigger, 21 to 28 inches (53-71 cm), grayish brown with small pale spots, a thick all-black bill and long legs.

Least Bittern. Smaller, 11 to 14 inches (28-36 cm), and mostly buff with a dark cap. Juvenile Green Herons can look similarly brown, but they lack the Least Bittern's bold buff patches on the inner wing.

American Bittern. Much bigger, 23 to 34 inches (58-86 cm), warm brown with strong stripes down the front, and it hides in tall marsh plants. Young American Bitterns have a brown neck mark where adults have a black one.

How many babies do Green Herons have?

Usually 3 to 5 eggs in a clutch, sometimes 2 to 7. In the north pairs probably raise one brood a year; farther south they generally raise two.

How long do young Green Herons stay with their parents?

They leave the nest at 16 to 17 days and follow their parents to the feeding grounds by about 25 days. In the mid-1990s their age at independence had only been estimated, at about 30 to 35 days.

What are baby Green Herons called?

Chicks or nestlings while they are in the nest, fledglings once they have left it, and juveniles while they wear their first, streaked plumage.

1. Davis, W. E., Jr., Kushlan, J. A. (2020). Green Heron (Butorides virescens), version 1.0. Birds of the World (A. F. Poole and F. B. Gill, editors). Cornell Lab of Ornithology. doi:10.2173/bow.grnher.01
2. Niethammer, K. R., Kaiser, M. S. (1983). Late summer food habits of three heron species in northeastern Louisiana. Colonial Waterbirds 6: 148-153. Accessed 1 November 2026.
3. Meyerriecks, A. J. (1962). Green Heron. Handbook of North American Birds, vol. 1 (R. S. Palmer, editor), Yale University Press. Accessed 1 November 2026.
4. Laura Mae (2021). Green Heron nestlings begging, Chesapeake, Virginia, 24 July 2021. iNaturalist sound 282097. Accessed 1 November 2026. Source
5. Norris, D. (1975). Green Heron (Butorides virescens) uses feather lure for fishing. American Birds 29: 652-654. Accessed 1 November 2026.
6. Higuchi, H. (1986). Bait-fishing by the Green-backed Heron Ardeola striata in Japan. Ibis 128: 285-290. doi:10.1111/j.1474-919x.1986.tb02677.x
7. Cornell Lab of Ornithology. Green Heron. All About Birds. Accessed 1 November 2026. Source
8. National Audubon Society. Green Heron. Guide to North American Birds. Accessed 1 November 2026. Source
9. National Audubon Society. Black-crowned Night Heron. Guide to North American Birds. Accessed 1 November 2026. Source
10. National Audubon Society. Yellow-crowned Night Heron. Guide to North American Birds. Accessed 1 November 2026. Source
11. National Audubon Society. Least Bittern. Guide to North American Birds. Accessed 1 November 2026. Source
12. National Audubon Society. American Bittern. Guide to North American Birds. Accessed 1 November 2026. Source