Scientific papers published using RAS data
About the seasonal survival of suburban blackbirds
Summary: Survival is a key demographic parameter in bird populations yet remarkably little is known about the seasonal pattern of survival. Mortality may increase as a result of breeding behaviour, harsh environmental conditions, resource limitation or any combination of these; knowing which is important for understanding the ecology of population change. We analyse an intensive ten-year colour marking programme of European blackbirds Turdus merula to estimate seasonal and sex-specific survival rates. The annual survival rate (0.67) was similar to that produced from analyses of dead recoveries across Britain, but within year variation was significant. Survival rates were lowest during the early part of the breeding period and highest in the autumn, but there was little difference between the sexes. Understanding this pattern of variation is important in interpreting both life-history variation and the mechanisms of population change.
How African rain affects the survival of Swallow, House Martin and Sand Martin
rainfall in Britain, suggesting that overwinter food resources may be more limiting.
Robinson, R.A., Balmer, D.E. & Marchant, J.H. 2008. Survival rates of hirundines in relation to British and African rainfall.Ringing & Migration24:1–6
BTO & Lincolnshire Bird Club Conference 2021
This year the BTO & Lincolnshire Bird Club conference is going virtual with an afternoon of talks you can watch from the comfort of your home for just £5. The conference will be held online using Zoom. 15.00...
BTO Conference 2020
The 2020 BTO Conference is available to view online. Catch up on a wealth of interesting talks and panels celebrating the efforts of BTO volunteers and members.