Assertion: prairie dog's predator | /r/HasProperty | black-footed ferret
Facets:
value: primarily
type: DEGREE
value: historically
type: TEMPORAL
Source sentences:
text: Historically, the major predators on Black-tailed Prairie Dogs were primarily the Black-footed Ferret and the Badger (Bailey 1905, Koford 1958, Stromberg et al. 1983, Cully 1989).
text: Another predator that depends on prairie dogs for its own survival is the black-footed ferret (Mustela nigripes) Not mentioned by Lewis or Clark, the black-footed ferret was not discovered and described scientifically for another half-century, but by 1900 it had already been practically extirpated from most of the Great Plains.