Individual study: Use of artificial perches by birds in unburnt and annually burnt tall-grass prairie at Konza Prairie Research Natural Area, Kansas, USA
Knodel-Montz J.J. (1981) Use of artificial perches on burned and unburned tallgrass prairie. Wilson Bulletin, 93, 547-548
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Use perches to increase foraging success
A controlled study in June-July 1979 in tallgrass prairie at Konza Prairie Research Natural Area, Kansas, USA (Knodel-Montz 1981), found that bird densities in unburned prairie sites were no higher in areas provided with artificial perches than in areas without perches (31 males of all species/ha in both areas). Numbers were higher in a burned area with perches (56 males/ha vs. 27) but not when dickcissel Spiza americana and red-winged blackbird Agelaius phoeniceus (attracted to a stream in the former area) were excluded. Twenty three perches (1.5 and 2 m long wooden stakes) were added to a 35-ha area of annually burned prairie and 17 to an adjacent 25-ha unburned area. A 12-ha area of burnt and a 39 ha unburnt prairie with no artificial perches served as controls. Eight species used 48% of perches in the burned area, compared with 29% used by four species in the unburned area.