Winter finch and sparrow populations fluctuate widely, but at times the grassy fields on the east of the bridge can produce 20 species.
(Winter; sparrow; populations) (Winter finch and sparrow populations; fluctuate; widely) (at times the grassy fields on the east of the bridge; can produce; 20 species)
Winter Winter finch and sparrow populations at times the grassy fields on the east of the bridge
sparrow fluctuate can produce
populations
widely
20 species