A ring fitted to a White-tailed Eagle nestling that fledged in the Highland region of Scotland in 1996 allowed the individual to be identified in the field as an adult bird in 2020, making it the oldest known bird of this species in in Britain and Ireland, according to the British Trust for Ornithology’s (BTO) latest ringing report.
In contrast, with a wingspan of just 18cm, the Chiffchaff, a type of warbler, is among the smallest of our breeding birds. The species has a typical lifespan of around two years but an individual ringed at Rutland Water in July 2009 has become the oldest known Chiffchaff in Britain and Ireland. It was recaptured 10 years, 10 months and 27 days after the first encounter, since when it must have clocked up around 10,000 miles commuting annually between its breeding site in Rutland and its wintering grounds in Iberia or Northern Africa.
Lee Barber, Ringing & Nest Recording Surveys Organiser at BTO, noted that:
BTO Researcher Rob Robinson is one of the scientists who analyses the huge dataset generated by the efforts of these volunteers.
More information can be found on the Online Ringing Report.
Source: BTO. BTO’s work is funded by BTO supporters, government, trusts, industry and conservation organisations. www.bto.org