By https://www.flickr.com/photos/robertmuckley - https://commons.wikimedia.org/w/index.php?curid=36399287
Reier
Sources:
(*) https://en.wikipedia.org/wiki/Slaty_egret
(*) https://ebird.org/species/slaegr1
(*) https://search.macaulaylibrary.org/catalog?taxonCode=slaegr1