Have you ever seen the Little Blue “Calico” Heron? I had not, until this summer. I thought at first we have yet another species to add to the wonderful world of wildlife found on Cape Ann. The calico heron is not at all a different species but is the in-between stage of the Little Blue Heron as it loses its first hatch-year white plumage and gains its adult blue plumage.
In the bird’s first summer after hatching the Little Blue Heron is pure white, with just a wee bit of grey at the wing tips. In its second hatch-year, you’ll find the Little Blue Heron in a range of white and blue-gray combinations. By the third summer, the Little Blue Heron’s body feathers are a tableau of rich blue-grey-green with lovely violet maroon neck and head feathers.
During the breeding months, Little Blue Herons are occasionally seen at Cape Ann marshes, freshwater ponds, and along the shoreline. By late summer and autumn they can be found in mixed flocks of Great Egrets, Snowy Egrets, Green Herons, and Great Blue Herons, feasting on fish and frogs to build a reserve of fat for the southward migration.