Perhaps as early as the 1840s, at any rate by 1870, all Heath Hens were extirpated on the mainland.

Collier's Encyclopedia, Volume 11 Germanium to Heath Hen, p. 372-3.

This one's for the Heath Hen.

Prairie chickens were indiscriminately introduced to the Eastern Seaboard after the Heath Hen was gone from the mainland, but failed to thrive.

In 1923, he argued against a measure to promote hunting on Martha's Vineyard that would have stressed populations of the ultimately doomed Heath Hen.

The Heath Hen, Tympanuchus cupido cupido, which was historically found along the Atlantic coast is extinct.

The extinct Heath Hen of the American east coast, usually considered a subspecies of the Greater Prairie-Chicken, has been considered a separate species.

Heath Hen (extinct)

"Booming Ben," a solitary Heath Hen, was last seen 11 March 1932 on Martha's Vineyard, Massachusetts.

He was also known for his studies of the Heath Hen and his attempts to save the species.