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British Birds - February 2020 (1 Viewer)

Docmartin

Thought Police
British Birds February 2020

The February 2020 issue of British Birds is now out.

Population estimates of birds in Great Britain and the United Kingdom
This is the fourth report by the Avian Population Estimates Panel. Overall, there are thought to be about 84 million breeding pairs of birds in the UK, similar to the total in APEP 3 (2013). The Wren continues to be the most common species, with a current estimate of 11 million pairs, which has increased since APEP 3. There are more than one million pairs of 20 species (23 in APEP 3) and these 20 species contribute 77% of the total (58% of the total is accounted for by the ten commonest species alone).
Water Rails in the UK – an estimate of the breeding population There is good evidence that the breeding Water Rail population in the UK is higher than reported. Estimates from county recorders during 2016 and 2017 were used to derive an updated national total, of between 2,500 and 3,900 breeding pairs or territories.

The tide is turning for lead ammunition
Birds are poisoned by lead from ammunition, for example when waterbirds and gamebirds ingest gunshot mistakenly for grit or food. Despite global scientific consensus on the risks from lead ammunition, and the widespread availability of non-toxic alternatives, transition away from lead has been slow. In the UK, there is a conspicuous absence of political and regulatory action in the face of increasing evidence of the risks to wildlife and people.

The BB/BTO Best Bird Book of the Year 2019

Obituaries Peter Davis, Mike Peacock

Notes Ringed Plovers nesting on warehouse roof

BB eye New Networks for Nature

My patch Gipping Valley

News & comment and Recent reports complete the February issue.

For more details, and to see a recent issue of the magazine, visit our website at www.britishbirds.co.uk
 
Hi,

Here's a recent article on the impact of lead ammunition on wildlife:


The impact of lead poisoning from ammunition sources on raptor populations in Europe

Highlights

• Lead poisoning causes deaths of some raptor species in Europe.
• Lead poisoning reduces population sizes of some raptor species in Europe.
• Prevalence of lead poisoning of raptors correlates with the density of hunters.

Abstract

Poisoning caused by ingestion of spent lead (Pb) ammunition in food items is a common cause of death of raptors. However, there has been no previous attempt to assess the impact of lead poisoning on populations of raptors throughout Europe or examine how this relates to the prevalence of hunting. We used measurements of lead concentration in the liver from over 3000 raptors of 22 species found dead or dying in the wild in 13 countries and a lead poisoning threshold of 20 ppm (dry weight) to assess the proportion of these in which lead poisoning caused or contributed to death. The prevalence of lead poisoning as a cause of death of raptors varied substantially among European countries and was positively correlated across countries with the reported number of hunters per unit area. Ten species had a non-zero proportion of individuals with concentrations exceeding the lead poisoning threshold ranging between 0.3% and 16.5%. The estimated annual conditional death rate from lead poisoning for these ten species averaged 0.44% (range 0.06–0.85%). Scavenging species feeding regularly on carcasses of game animals,tended to have a high annual probability of death from lead poisoning. So too did some predators which only sometimes scavenge, but prey on frequently hunted birds, such as gamebirds, waterfowl and pigeons, which may contain ingested or embedded lead shot. Small-bodied predators had a low annual probability of death from lead poisoning. Modelling indicated that European populations of adult raptors of the ten focal species averaged 6.0% smaller (range 0.2–14.4%) than they would be without the effects of lead poisoning. A given rate of lead poisoning mortality resulted in greater expected population reductions for species with high annual survival rate and late age at first breeding.

Regards,

Henning
 
Makes me laugh, still using lead in shot gun cartridges but was banned in the fishing world years ago because that was where the lead shot was coming from that was killing the wildlife.
 
This is for rifle shots, pellets of lead have been banned for a while
 
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