Long-billed Curlew populations were studied in the upper Green River Basin of Wyoming. Sites were selected where curlew populations appear constant in numbers and declining in numbers. Results show that while few habitat differences were found between the two areas, disturbances such as grazing and dragging during nesting reduced productivity. Nest failures were also correlated with field fertilization and early season grazing. Within each area curlews nested successfully on field sites that were elevated and had adequate grass cover but not tall grass.
Cochran, Jean F. and Anderson, Stanley H.
"Comparison of habitat attributes at sites of stable and declining Long-billed Curlew populations,"
Great Basin Naturalist: Vol. 47
, Article 8.
Available at: http://scholarsarchive.byu.edu/gbn/vol47/iss3/8