Individual study: Burrowing owls Athene cunicularia have lower reproductive success in artificial burrows, compared to natural burrows
Botelho E.S. & Arrowood P.C. (1998) The effect of burrow site use on the reproductive success of a partially migratory population of western burrowing owls. Journal of Raptor Research, 32, 233-240
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Provide artificial nesting sites for owls
A replicated, controlled trial in 1993-5 in arid shrubland in New Mexico, USA (Botelho & Arrowood 1998), found that burrowing owls Athene cunicularia (formerly Speoty cunicularia) nesting in artificial burrows produced significantly more nestlings, but significantly fewer fledglings than pairs in natural burrows (3.5 nestlings/pair and 1.5 fledglings/pair for eight pairs in artificial burrows vs. 2.2 nestlings/pair and 1.9 fledglings/pair for 59 natural burrows). Only 12 of 28 nestlings (43%) in artificial nests survived to fledging, with most being predated or cannibalised. Artificial burrows were constructed from a 19 l plastic bucket buried and connected to the surface with 5 m of 10 cm diameter PVC pipes. Both bucket and pipes had holes drilled in to ensure drainage.