Assertion: tern's subspecie | /r/HasProperty | recognised
Facets:
value: usually
type: DEGREE
Source sentences:
text: Four subspecies are recognised:
text: Four subspecies of the common tern are generally recognized, although S. h. minussensis is sometimes considered to be an intergrade between S. h. hirundo and S. h. longipennis.
text: Five subspecies are usually recognised:
text: Three subspecies of the lesser and five subspecies of the great frigatebird are recognised.
text: Four subspecies are recognised, but there is evidence of clinal variation in body size—with smaller birds in the north and larger in the south—and hence no grounds for subspecies.