In general, members of Pelecaniformes are a bit quieter than other orders of birds, so hearing them in the field can be difficult. However, one may occasionally be able to hear a great blue heron squawking overhead if a nesting colony is nearby. I've always felt that great blues look and sound prehistoric when flying, almost like a pterodactyl. Herons don't really sing so much as they squawk, croak, or honk, which sounds a bit like a scratchy wah-wah-wah-wah. Great examples of all types of great blue calls can be found here.
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| Great blues are most vocal near their breeding colony. |
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