|To:||Bill Hall <>|
|Subject:||North American studies|
|From:||David Rees <>|
|Date:||Tue, 30 May 2017 00:03:54 +0000|
For those interested in climate change related changes in animal distribution that you can see happen within your own experience an interesting case that I am familiar with is that of the Wall Brown butterfly in NW Europe.
'Traditionally' in this area it has two generations a year. Things appeared to have warmed up in recent years so it tries to have three, only for many to get 'caught out' as winter sets in. This appears to be a major reason (there may be others) why it has quickly disappeared from many areas. In England and Wales it used to be found almost everywhere, now it hangs on in seemingly slightly cooler coastal localities, having abandoned inland areas of suitable habitat. It remains to be seen if, when it/if warms up a bit more, it will bounce back when it can properly have three generations a year as it currently does in southern Europe! for more http://butterfly-conservation.org/3114-7566/has-warming-weather-wrong-footed-the-wall.html there are fuller scientific articles available.
Bird watching in southern Britain now means you are likely to encounter breeding Little Egrets, Cetti's Warbler and Mediterranean Gulls, all birds that have moved in from the south within my lifetime. Cattle Egrets have also bred there but are not yet established (expected soon). On the south coast you see more Little egrets now than Grey herons. From my experience, numbers and distribution of Cetti's Warbler seem to have exploded in the last few years. it is a hard bird to see (sulky) but its call is loud and highly distinctive see https://vimeo.com/116439123. You are also more likely to see Warblers like Blackcaps and ChiffChaffs hanging around in the winter now. Exotic Ring-necked Parrots are thriving, esp in the outer suburbs of SW London. The Sub-Saharan Egyptian Goose is now a common breeding bird on shallow water bodies in central southern England, having escaped from wildfowl collections (have lots of footage - cute chicks...).
On Mon, May 29, 2017 at 10:17 PM, Bill Hall <> wrote:
The full article can be found at this link
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