As Egrets move into a rookery they upset the delicate balance, tear it up really. They bring chaos where there was a serene atmosphere.

Egrets are aggressive, loud, and dangerous. Great Blue Herons calm, until pushed over the limit.
Like this female above.

She will eventually let them build a nest below hers, which can be dangerous. For now she is bigger, and pregnant. This Egret is learning the rules, the hard way.
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