On Monday 24th May, licensed BTO
(British Trust for Ornithology) ringers handled and ringed two of the chicks,
both females. Each chick was given a unique metal ID ring (right leg) and an
orange colour ring (left leg). The orange ring codes were P4N and P7N
They were then measured and
weighed, coming in at 879g and 824g respectively. For 21 days old they were
very well fed - we have been monitoring their prey which includes mostly
starlings and feral pigeons.
Volunteers from the British Mountaineering Council
helped access the nest and chicks. Sadly, despite the fact that the ringing was carried out at
exactly the approved time in terms of the chick's age, and the climber
carefully abseiling to the nest location
slowly and carefully, one of the chicks (highly unusually) moved away from the
nest tray and fell, sadly not surviving the fall.
Naturally such an event is
taken very seriously and all procedures have been reviewed to ensure this is
minimised at any future nests.
The lead ringer present on Monday is one of the most experienced
Peregrine workers in the UK and has ringed 350 chicks in 14 years; this is the first casualty (0.3%) arising from such
intervention. The good news is that next year our nest tray will be replaced
with a much wider and deep nest tray which will be safer for the chicks.
The
ringing of the chicks contributes to a wider study - we know that some chicks,
especially males, from Gloucestershire stay local while others, especially
females may move into the Midlands and further afield. The females head off
further afield looking for males in new territories to avoid inbreeding.
It will be interesting to know if these two chicks are re-sighted and if so
where they end up.