Conservation Evidence strives to be as useful to conservationists as possible. Please take our survey to help the team improve our resource.

Providing evidence to improve practice

Individual study: Effect of burn frequency on abundance of wintering Henslow's sparrows Ammodramus henslowii in longleaf pine Pinus palustris savanna remnants in south-eastern Louisiana, USA

Published source details

Bechtoldt C.L. & Stouffer P.C. (2005) Home-range size, response to fire, and habitat preferences of wintering Henslow's sparrows. Wilson Bulletin, 117, 211-225

This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Use prescribed burning on pine forests Bird Conservation

A site comparison study in the winters of 2001-2002 at three pine savanna sites in southeast Louisiana, USA (Bechtoldt & Stouffer 2005), found that wintering Henslow's sparrow Ammodramus henslowii abundance was significantly higher in areas burned the preceding growing season (average of 3 birds/ha) than in areas burned two or three years previously (1 bird/ha). Eight areas were burned once in May-August 1999-2001. There was a trend for decreasing sparrow abundance with time since burn: 1.0/ha in areas burned one year previously, around 0.7/ha in areas burned two years previously and 0.2/ha in those burned three years previously. Of vegetation characteristics measured, average seed abundance (which decreased with time since burn) was the best predictor of sparrow abundance.