Gapeworm n. : The parasitic worm that causes the gapes in birds. See Illustration in Appendix.

Example:
How to treat Gapeworm in a chicken?

Taxonomy
Syngamus trachea, trachea, free encyclopedia, birds, eggs, gape, red worms, infected, search, Gapeworms, Kingdom, Phylum, Family, Genus, Species, infecting, disease, clog.

Defination from the web:
... When the female gapeworm lays her eggs in the trachea of an infected bird, the eggs are coughed up, swallowed, then defecated. ...