• The Brandywine Zoo’s black-crowned night heron was hatched at the Florida Aquarium in 2008.

• Nestlings often disgorge their stomach contents and defecate when approached by intruders.

• Black-crowned night herons are social year round, associating with other species of herons, egrets, and ibises frequently. In the winter, they roost communally.


Colonies of Black-crowned night herons can provide good indications of overall environmental quality, because night-herons forage at the top of food chain, nest in colonies (where they are fairly easy to study), and have a wide distribution. They tolerate disturbances such as traffic, so they are especially useful in revealing environmental deterioration in urban environments.