While gathering our thoughts and copping out at the same time on a day full of heavy and frequent rain showers, high winds and frequent but short spells of sunshine there was very little to hold our attention in the Wild World, so thank heaven's for John Giffords most interesting contribution!
Hi Bagsy
An adult White-tailed Eagle,
identified in the field in 2020 by its ring, has been confirmed as the oldest
known individual of this species ever recorded in Britain and Ireland. The
eagle had been ringed as a nestling in Highland Scotland in 1996, ageing it as
23 years and 11 months old.
Furthermore,
the oldest known British Common Chiffchaff was caught 10 years, 10 months and 27 days after it had initially
been ringed at Rutland Water in July 2009. The typical lifespan of this species
is around two years.
Lee Barber, Ringing & Nest Recording Surveys Organiser at BTO, said:
"930,088 birds were ringed by our 3,000 highly trained, licensed
volunteers in 2020, a slightly lower total than normal due to the restrictions
imposed as a result of Covid 19.
"The most commonly encountered species was Blue Tit,
with 118,771 individuals ringed, Blackcap (66,799), Goldfinch (56,742), Great Tit (54,405) and Common Chiffchaff (46,001). The large numbers
of these species ringed allow us to compare how they are faring in different
regions of Britain and Ireland, and in different habitats."
BTO Researcher Rob Robinson is one of the scientists who analyses the
huge dataset generated by the efforts of these volunteers. He said: "By
re-encountering these birds, either through reading of rings in the field or
through recapture, researchers can determine whether survival rates are
increasing or decreasing.
"These
re-encounters of individual birds help improve our understanding of their
movements, identifying where young birds settle to breed for the first time and
how pressures such as climate and land-use change, drive population
declines. For example, recent BTO analyses based on the 15,000 Eurasian Curlew that
have been ringed have shown that survival of adult birds is high, and that
action to improve conditions for raising chicks is required."
More information can be found on
the Online Ringing Report.
Cheers John.