Assertion: nuthatch's crown | /r/CapableOf | gravitate to flock
Facets:
Source sentences:
text: Black-capped Chickadees, Ruby-crowned and Golden-crowned kinglets, Red-breasted, White-breasted and Brown-headed nuthatches, Brown Creepers, and Downy and Hairy woodpeckers tend to gravitate to these flocks, which are led by the Carolina Chickadees, Tufted Titmice, or both.