Rate Of Spread Of Invasive Species

[waltjnr 6,857]

and parakeets seem to be doing pretty well!

[peterhunter86 8,627]

What about Magpies,they are non native . There's nice little micro climate here for CWD .woodland with arable and clumps of rushes in between.

 

My area is full of magpies there everywere horrible cnuting things.and in the last ten or so years ive noticed a lot of collared doves around and befor that i would never see them.

[jonnie bravo 572]

Lots of collared doves around my house. Starlings seem to be in big numbers too

[jukel123 8,293]

What about Magpies,they are non native . There's nice little micro climate here for CWD .woodland with arable and clumps of rushes in between.

I didn't realise magpies were non native. Are you sure? Where were they introduced from?

[jukel123 8,293]

Goosanders are my bugbear. Dozens on my local river. They wipe out anything they can swallow. Can't shoot them except under licence and then you are only allowed to kill a minuscule amount of them. A major cull is required.

[gamerooster 1,179]

Goosanders are my bugbear. Dozens on my local river. They wipe out anything they can swallow. Can't shoot them except under licence and then you are only allowed to kill a minuscule amount of them. A major cull is required.

Them and cormarants are a serious problem by me, the rivers are teaming with them

[jonnie bravo 572]

Goosanders and mink on the river near me.

[tinytiger 840]

 

 

What about Magpies,they are non native . There's nice little micro climate here for CWD .woodland with arable and clumps of rushes in between.

I didn't realise magpies were non native. Are you sure? Where were they introduced from?

knew they weren't native to Ireland-they got blown in here in a storm-how/when did they get to britain

[forest of dean redneck 11,643]

I read it in a book, where a shooter didn't know what one was so shot it an had it stuffed,but had a google and can't find no evidence about them being introduced so doubting it myself now .lol

[BGD 6,436]

Shakespeare wrote about magpies so if they were introduced it was a fecking long time ago.

[Francie 6,368]

Is the old broc not invasive lads? ?

[Hydropotesinermis 724]

 

 

 

Would the fish species not generally be dependent on Man spreading them to isolated water systems? They have these natural barriers unlike the mammalian species you mention. If there is no great desire by Man to continue the spreading then they'll remain localised within their current water systems would be my guess.

 

An interesting one is Chinese Water Deer, they're not restricted by any physical barriers like fish but seem to be fairly localised and not spreading to the same degree other deer species do.

 

Similar topic but I find it interesting why Roe heavily populate Northern and Southern Britain but are relatively rare in large part of the Midlands. Something I've put down to a general lack of woodland and farming interests. But maybe not?

 

Another peculiarity someone on here mentioned a while back is why hooded and carrion crows have separate geographical territories as a species with a contact zone that barely moves? Given they are basically identical species with only really a minor difference in appearance why then don't they inhabit the same areas?

There has to be a habitat, climate or food issue that haults an animals spread.

 

Chinese water deer suffer high fawn mortality rates and prefer arable farmland or phragmites reed beds etc, i woukd say that a mixture of unsuitable habitat and food has slowed their spread exacerbated by their fawn mortality rates.

 

I would suggest you are right for Roe. They are selective browsers so maybe again in the Midlands what ground there is is perhaps lacking suitable browse.

I believe the Roe one is habitat simply because the Roe that are here seem to generally be in cracking health. They don't struggle to rear two fawns to maturity and always look big, fat and muscled for their age. Obviously the Midlands differs from Fens to Wolds to Dales but it's not like their's a shortage of prime fodder for them, certainly enough to support a much larger population. The only thing I can put it down to really is a lack of extensive woodland to make them feel secure....

 

Or possibly they were smashed decades ago for the sake of the areas farming interests and still haven't quite recovered?

Yeah you might be right but the habitat doesn't explain how Roe are living in Glasgow city centre.

[gamerooster 1,179]

I read it in a book, where a shooter didn't know what one was so shot it an had it stuffed,but had a google and can't find no evidence about them being introduced so doubting it myself now .lol

Same, done a quick search and found no proof of them being introduced

[Daniel cain 45,661]

Rats and rabbit's are also introduced let's not forget, and I'd go as far as saying no other wild animal has shaped our history as much as these two..... I see texas is having a major problem with wild hogs, could that possiblyth happen here with boar?

plenty about if you know where to look atb dc

[gamerooster 1,179]

 

Rats and rabbit's are also introduced let's not forget, and I'd go as far as saying no other wild animal has shaped our history as much as these two..... I see texas is having a major problem with wild hogs, could that possiblyth happen here with boar?

plenty about if you know where to look atb dc

I'd be surprised if they where in Cumbria and I hadn't heard about them, though I could be wrong matey