Snag retention increases bird use of a clear-cut

  • Published source details Dickson J.G., Conner R.N. & Williamson J.H. (1983) Snag retention increases bird use of a clear-cut. Journal of Wildlife Management, 47, 799-804.


This study is summarised as evidence for the following.

Action Category

Use ring-barking (girdling), cutting or silvicides to produce snags

Action Link
Bird Conservation
  1. Use ring-barking (girdling), cutting or silvicides to produce snags

    A replicated, controlled study from May-June in 1977-1981 in four plots in pine-hardwood timber clearcuts in Texas, USA (Dickson et al. 1983), found that plots with deadwood snags had higher bird species richness and abundance than plots without snags (5 and 4 species/plot; 166 and 135 individuals/40 ha respectively). Similarly, indices of community diversity and evenness were also significantly higher in plots with snags. Cavity-nesting birds occurred on plots with snags but were virtually absent from plots without snags (13 compared to 1 individuals/40 ha). Other species used snags for foraging and perching. Seventy-five snags (9.4/ha) were made from killing trees of nine species in each plot. Plots were 80 x 250 m, four with snags and four without and were cleared in 1975 and planted with loblolly pines Pinus taeda in 1976.


Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 19

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust