This IBA includes the Colliers Mills Wildlife Management Area (WMA) and adjacent privately-owned lands. The site is characterized by expanses of pitch-pine/scrub-oak forest and scrub-shrub habitat. Atlantic white cedar (Chamaecyparis thyoides) communities are present in wetter areas. The IBA also offers an expanse of grassland habitat that is utilized by breeding grassland birds. Freshwater ponds provide habitat for wading birds and waterfowl.

Ornithological Summary

Conservation Concern - State:endangered: Vesper Sparrow (B)

Conservation Concern - State:threatened: Grasshopper Sparrow (B)

Conservation Concern - State:threatened: Savannah Sparrow (B)

Regional Responsibility Species - BCR 30 Upland Forest: Wood Thrush, Scarlet Tanager, Yellow-throated Vireo, Whip-poor-will, Great-crested Flycatcher, Black-billed Cuckoo, Baltimore Oriole, Northern Flicker, Black-and-white Warbler, Eastern Wood-Pewee, Broad-winged Hawk, Wild Turkey, Acadian Flycatcher, Gray Catbird, Carolina Chickadee, Tufted Titmouse, Blue Jay, Common Grackle, Wood Duck, Mallard, American Black Duck, Brown Thrasher, Baltimore Oriole (B)

Regional Responsibility Species - BCR 30 Scrub-shrub/Barrens: Prairie Warbler, Whip-poor-will, Blue-winged Warbler, Pine Warbler, American Woodcock, Field Sparrow, Eastern Towhee, Brown Thrasher, Eastern Wood-Peewee, Northern Bobwhite, Wild Turkey (B)

Significant Migrant Stopover/Flyover-Landbirds (SM)

Conservation Issues

Portions of Colliers Mills WMA are actively managed for early successional habitats including grasslands and scrub-shrub habitat. To maintain early successional habitats for species that require this habitat type, areas of the WMA are burned and mowed annually. Threats to the IBA include habitat loss and degradation caused by increased residential development on the periphery of the WMA and forest succession. Continued active management as well as restoration and protection of the adjacent privately-owned lands are recommended.


NJ Division of Fish and Wildlife
Bureau of Land Management
P.O. Box 400
Trenton, NJ

Telephone: (609) 984-0547


Typical Pine Barrens habitats including mixed upland forest and shrub-scrub

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