
Little Blue Heron (adult)
The Little Blue Heron (Egretta caerulea) is unique amongst herons as it is the only species with two distinct colour morphs for mature and immature birds, with the adult bird being mostly slate-blue and the immature almost entirely bold white. You can see the Juvenile here:

The little blue heron is a small heron. It breeds in the Gulf states of the US, through Central America and the Caribbean south to Peru and Uruguay. It is a resident breeder in most of its range, but some northern breeders migrate to the southeastern US or beyond in winter. There is post-breeding dispersal to well north of the nesting range, as far as the Canada–US border.
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