Birds
Little Blue Heron
Egretta caerulea · also called little blue herons
Hatching entirely white before slowly turning slate-blue over its first year, a little blue heron passes through an oddly patchy, blotched phase along the way, one of the more unusual plumage transformations found in any heron.
Overview
The little blue heron, Egretta caerulea, is a slate-blue heron native to wetland and coastal habitat across the Americas. Its unusual delayed colour change from an entirely white juvenile to a slate-blue adult, confusing patchy transitional plumage, and frequent mix-ups with the white snowy egret make it one of the more identification-challenging yet biologically fascinating herons found anywhere in the Americas.
A colour change unlike any other heron
Most herons hatch looking roughly like smaller versions of their parents, but the little blue heron takes a strikingly different path, spending its first year cycling through white, patchy, and finally solid slate-blue plumage.
Status
Least Concern, though declining in parts of its range due to habitat loss despite remaining present across suitable wetland and coastal habitat throughout the Americas.
Little Blue Heron: common questions
Why is the little blue heron white when it hatches?
This species hatches entirely white and only gradually develops its adult slate-blue plumage over its first year, passing through an unusual patchy, blotched transitional phase along the way.
Why do people confuse young little blue herons with snowy egrets?
This species' white juvenile plumage closely resembles the snowy egret, and telling the two apart reliably requires a close look at bill and leg colour rather than relying on overall plumage colour alone.
What does an adult little blue heron look like?
This species develops a slate-blue body as an adult, often with a maroon or purplish tone across the head and neck, a striking contrast to its entirely white juvenile plumage.
How does the little blue heron hunt?
This species hunts with a slow, deliberate stalking style, wading carefully through shallow water before striking at fish, amphibians, or invertebrates, a more patient approach than some of its more active relatives.