Amidostomum anseris

Am·i·dos·to·mum an·ser·is

(am-i-dos'tō-mŭm an'ser-is),
A species of bloodsucking nematodes, similar to those of the genus Trichostrongylus, which parasitize the gizzard and sometimes also the proventriculus and esophagus of domestic and wild ducks and geese; it it widely fatal in young birds.
[amido- + G. stoma, mouth, + L. anser, goose]

Amidostomum

a genus of the helminth family of Amidostomatidae.

Amidostomum anseris
parasitic in the gizzard of ducks and geese. Lethal to young birds because of blood-sucking and mucosal damage.