Providing evidence to improve practice

Individual study: Least bitterns Lxobrychus exilis exhibit high nest density and reproductive success in managed wetlands

Published source details

Post W. (1998) Reproduction of Least Bitterns in a Managed Wetland. Colonial Waterbirds, 21, 268-273

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

Restore or create inland wetlands Bird Conservation

A replicated study from April-June in 1985-1991 in a 13 ha wetland site in South Carolina, USA (Post 1998), found that least bitterns Ixobrychus exilis nested at high densities (12 pairs/ha), had a 50% hatching rate and 55% of nests produced fledglings. The author points out that this rate is only slightly lower than that reported for natural wetlands. An average of 2.7 fledglings/nest were produced from an average 3.8 eggs/clutch. Most egg mortality was caused by nest instability.