The primary food for Great Blue Heron is small fish though they are also known to eat shellfish, insects, rodents, amphibians, reptiles and small birds.  It is generally a solitary feeder. Individuals usually forage while standing in water, but will also forage in fields or drop from the air, or a perch, into water. As large wading birds, Great Blue Herons are able to feed in deeper waters, and thus are able to exploit a niche not open to most other heron species.