This video is about lesser redpolls and other birds at a feeder in Scotland.
From the Royal Society for the Protection of Birds in Britain:
All change in the finch family; Siskins and Lesser Redpolls increase while Greenfinches decline
Last modified: 31 July 2013
Many householders have become familiar with the sight of Siskins and Lesser Redpolls on their garden bird feeders in recent years, and the latest figures from the Breeding Bird Survey (BBS) confirm that numbers of both these small finches are increasing nationally. However, Greenfinches, which have been hard hit by the disease trichomonosis, continue to decline.
Siskins are small, bright yellow finches that normally breed in conifer woodlands, and forty years ago they were confined to the highlands of Scotland and Wales. However, the increase of commercial forestry has seen a remarkable increase in range, and in recent years they have started to take advantage of garden food supplies in the winter and early spring, which may have boosted survival rates. The latest BBS figures show that 2012 was a particularly good year for Siskins nationally, with numbers increasing by 28% between 2011 and 2012.
Lesser Redpolls, brown with a red cap, are closely related to Siskins, but have a very different history, having declined dramatically since the 1970s. Like Siskins, however, Lesser Redpolls now appear to be benefiting both from new forestry habitats, and, more recently, from garden bird feeding. The BBS shows that numbers have increased by 55% since the start of the survey in the mid-1990s, and by 25% between 2011 and 2012.
Kate Risely, BBS organiser at the British Trust for Ornithology, said: “While many people are seeing Siskins and Lesser Redpolls in their gardens for the first time, others are noticing the decline in Greenfinches. Numbers of this common garden bird have been badly affected by the disease trichomonosis, particularly in London, the south-east and the south-west, where numbers have declined by 58%, 30% and 30% respectively since the start of the survey in 1994. “These figures tell us exactly what is happening to the populations over one hundred of our bird species, and put into a national context the changes that people are seeing played out in their back gardens and on their bird feeders. We owe this information to dedicated volunteer birdwatchers across the country.”
Dr Mark Eaton, RSPB conservation scientist, added: “In recent years our members have definitely noticed more Siskins and Lesser Redpolls coming into their gardens in winter to feed on the food they provide. Siskins, the males in particular, are certainly a bright and striking sight while Lesser Redpolls stand out with their characteristic red head markings. “Lesser Redpolls are naturally woodland birds and the increases in their recent fortunes are likely to have been tied to changes in the availability and age of coniferous forestry. They went through major declines in the 1970s and 80s and were placed on the conservation red list – so it is great to see them bouncing back, although they are still much rarer than they once were.
“Trichomonosis in Greenfinches and other wild birds is something we are continuing to monitor and research, in order to find out what impact the disease is having and whether action needs to be taken to help them.”
Deborah Procter, Senior Monitoring Ecologist at JNCC, said: “This year we have begun the process of compiling a major assessment of the status of UK’s birds as part of a European review of bird conservation status to be published in 2015. Trend data from the BBS gives invaluable insights into how particular UK bird species are responding to pressures both within the UK and elsewhere. The European context that will come from this assessment in due course will be especially important in the setting of future UK priorities.”
Breeding biology of the European Greenfinch (Chloris chloris) in the loquat orchards of Algeria: here.
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Trichomonas does not survive for long in the environment and needs fairly close contact between birds, their food and their droppings to spread. Unfortunately bird feeders create the ideal environment to help the parasite spread, to the obvious detriment of the greenfinches.
Regularly cleaning bird feeders may help in this.
It would. The RSPB recommends not feeding and leaving bird baths dry for two to four weeks to encourage birds to disperse, decreasing transmission and infection rates (I would prefer to do away with feeders altogether but that is unlikely to happen). They also suggest disinfecting feeders with bleach.
Yes, I agree with these RSPB points.
Arguments against doing away with feeders altogether:
– More birds would die from hunger.
– It would mean less human-bird links; weakening the social base for pro-bird measures.
Thank you for this. I will wash my bird feeder immediately. In Wenlock we are surrounded by farm fields and woodland, but I have rarely seen a green finch in recent years, or a chaffinch for that matter. We do, however, have the most magnificent rookery nearby, which is an endless source of fascination. Have you got any rook info by the way? We’re trying to interpret some of their twilight behaviour and so far can’t find any decent books on the subject; wondered if there were some scientific papers that delve into this?
I am glad the info helps you 🙂
Unfortunately, I don’t know about research into rooks and twilight.
Here’s the link to my vid on rooks coming to roost as seen over the garden wall
Hi Tish, thanks so much for this fine video!
I think many of the birds in the video are jackdaws, not rooks. Jackdaws are smaller, have a more high-pitched voice:
In these two links are the sounds of these two species.
Jackdaws and rooks sometimes have mixed colonies together.
Many thanks for the links. We do have jackdaws, but pretty sure most of the birds are rooks. They zoom low over our house so you get a good, somewhat Hitchcockian view. But will look more carefully now you have alerted me to the mixed colony possibility. This might explain the repeated exiting and re-grouping over the roost towards dusk. It’s almost as if everyone comes home and gets onto the wrong perch and has to go away and start all over again. Either that or someone’s missing, because then a large cohort will dash out of the wood and back out over the countryside as if scouting. After about ten minutes they return. At the moment they are not doing the Mexican Wave manoeuvre as on the vid. You can tell we don’t have a TV!! Also the vid was taken on cheapo Kodak easyshare whose sound quality is somewhat questionable.
When I was small, there was a mixed rook-jackdaw colony not far away.
Jackdaws often fly around in big flocks before going to sleep.
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