Harrier
WordNet
noun
(1) Hawks that hunt over meadows and marshes and prey on small terrestrial animals
(2) A hound that resembles a foxhound but is smaller; used to hunt rabbits
(3) A persistent attacker
"The harassers were not members of the regular army"
WiktionaryText
Noun
- Any of several birds of prey in the genus Circus of the subfamily Circinae which fly low over meadows and marshes and hunt small mammals or birds.
- A runner, specifically, a cross country runner.