Showing posts with label ringing. Show all posts
Showing posts with label ringing. Show all posts

Monday, 16 April 2012

A thrilling wildlife moment - redstart

I had one of those truly thrilling wildlife moments yesterday - it's very personal and relates to redstarts, a relative of the robin which have just arrived in the UK from West Africa. They are stunning birds and at Portbury Wharf Nature Reserve I had the chance to hold and ring a beautiful male. Some people may opt for a bird of prey or a colourful parrot as their ultimate bird to see up close, but for me, seeing this beauty in the hand was just so exciting!


After missing out on a deluge of migrants dropping in to the reserve on Saturday morning I was determined to be at the ringing site on Sunday morning after leading a dawn chorus cycle ride in Bristol's Avon Gorge. There were less migrants around but from our ringing site we were watching a female and the odd male redstart fly-catching in the nearby scrub. 


Towards the end of the ringing session, around lunchtime, I went to check some nets for the last time and suddenly spotted a male redstart on the grass. It flew away from me and flew straight into the pocket of one of our mist nets! Eureka! I ran over to the net, safely removed the bird and brought it back for ringing. 


And here it is!






I've been wanting to see one up close for years - I used to spot redstarts at Thursley Common in Surrey when I was a teenager and have since seen them in the Forest of Dean and different parts of Wales. 
However, their black mask, white forehead and rusty-red tail have fascinated me - a truly flashy bird. 






What's even more remarkable is that these birds have been wintering in the scrubby woodland in parts of West Africa - countries such as Guinea, Ghana and Ivory Coast. In recent weeks they have been flying across Africa, into Spain, France and in recent days have arrived en masse in the UK. And they've been everywhere, heading to mature oak woodlands, heathland and pasture, particularly in the west of Britain. 


Let's hope he makes it to his woodland territory and gets spotted by another ringer or birder!

Saturday, 31 December 2011

Young Peregrine travels from Avon Gorge to the West Midlands


I've been colour-ringing peregrine chicks since 2007 with the help of fellow BTO ringer Ade George, and volunteer climbers from the British Mountaineering Council. In each year I have been building up the number of nest sites we visit to maximise how many chicks we ring. With bird ringing (or banding) it is a numbers game - the more birds you ring, the more likely someone will spot one of 'your' birds and report it. With colour-ringed birds this likelihood increases hugely - while only perhaps 2% of birds with just metal ID rings may be resighted, up to 98% of birds colour-ringed may be recovered.



BX - one of five chicks ringed in the Avon Gorge in 2010. Photo by Ed Drewitt.
With my peregrine work the results can be a little delayed. In the first first few years a peregrine's life is very nomadic as it travels around getting to know the region and no doubt look for a mate. So it's not until a peregrine begins to settle at a nest site at two or three years old that it may be seen and identified by birders.


Of my peregrines that have been re-sighted so far, most have been quite close to Bath and Bristol, near where we ringed them. For example, one was seen with a female partner 15km south of Bristol from where it was ringed two years later; another is now the breeding male at a nest in Bath where it hatched; and a third individual was re-seen later in the autumn at the site where it was ringed and had fledged earlier that year.


Our furthest travelled bird however goes to the following individual. One of the young peregrines we ringed in the Avon Gorge in 2010 was also filmed for the BBC's Springwatch.
He was given a blue colour-ring with black letters, BT (his sibling BX is in the photo above)


He was spotted and photographed by Michael Colquhoun in the Malvern Hills, Worcestershire back in April 2011. This was exciting news and it was great to know one of the chicks had ventured so far. 

BT in April, 2011 - now is partial adult plumage in the Malvern Hills. Photo by Michael Colquhoun
BT's colour ring clearly visible. Photo by Michael Colquhoun.
However, I then had sad news in October 2011 that a peregrine with one of my colour-rings had been found dead by a dog walker not far from KIdderminster in the West Midlands. After exchanging e-mails with local birder Jason Kernohan who met the dog walker and recovered the dead bird, I discovered it was the same colour-ringed individual, BT. 


He had been dead for four days before being found (as indicated by the development of moaggots). He was taken to a vet by the police for an x-ray to confirm he hadn't been shot. He had been found below power lines and seems likely he had died from some interaction with these. 

BT's colour ring. Photo by Jason Kernohan
BT's metal BTO ring. Photo by Jason Kernohan.

Despite this young bird's death I'm pleased we know his final outcome and where he travelled. It helps build up a bigger picture of what peregrines do when they fledge. It's interesting that we've not heard from the other four chicks that were in that same family. Yet we have heard from this individual twice! Hopefully as the other four (assuming they are all alive) begin breeding they will be spotted and identified by myself or someone else watching them.





Tuesday, 6 December 2011

Colour-ringingd Robins - alas, halted by the British weather again!

The British weather - a phenomenon we always seem to be talking about and something where there is genuinely (arguably!) always something to be chatting about! And this morning is of no exception. Helping a Masters student at the University of Bristol with a project on robins we were all set for catching and ringing a few more this morning - but then at 4.30 this morning the rain was beating against my bedroom window and the wind speed had turned from calm (and clear starry skies) to gale force! Time to cancel and re-arrange - again!

The project itself involves carefully catching the robins in  a mist net, putting special colour rings that denote each individual on their legs plus a metal ring issued by the British Trust for Ornithology. Our red-breasted friends are then measured, aged and weighed before being released.

Dan, whose Masters project this is, is looking at the alarm calls of the robins and how the individuals
interact with each other - hopefully over the next few weeks before Christmas we'll be able to ring a few more to help Dan know who is who.

Below is a photo of one of the colour-ringed robins - I'm especially interested to see whether any of the robins disappear (perhaps as migrants) and who stays around or the spring to breed.



Thursday, 29 October 2009

Robins for the One Show

All set for colour-ringing robins as part of an experiment for the BBC's One Show to be shown before Christmas. We're seeking to find out more about the soap opera of robins living in a suburban neighbourhood in north Bristol - who knows what we might discover! Under my licence with the British Trust for Ornithology I'll be catching some robins in a mist net and Potter traps (small cages) and then carefully putting colour rings on their legs so we can identify them as individuals. They will then be released to carry on their lives as normal. Hopefully we can find out who's who, what territories are being set up and where, who may be passing through and how many are visiting the gardens. The unset traps are in place to allow the birds to get used to them in the gardens. Hopefully they will use them when we film on Monday - we're hoping to ring at least 6-8 robins if not more.