Bittern, Limpkin.
avocet
heron
avocet
Rail.
avocet
ibis
Avocet
Avocet
grebe
SPOONBILL sandpiper phalarope
The 5-letter word for a wading bird that ends with "SAC" is "EGRIS." Egrets are members of the heron family and are known for their long legs and necks, making them excellent waders.
Ibis?