Assertion: american black bear | /r/HasAspect | mating seasons
Facets:
value: with delayed implantation
type: OTHER
Source sentences:
text: American black bears (Ursus amercanus), brown bears (Ursus arctos) and polar bears (Ursus maritimus) all have mating seasons occurring within a three-month duration during the spring and summer months (approximately May – July), with delayed implantation occurring in late fall (November), and cubs born within the den during early winter (January).