Terrapins Uk, Should they stay? (1 Viewer)

[Avon Avians]

What was the point of bringing up a post that is really old hat. Our Government authority has long declared this species as invasive - end of. Nothing new from your ramblings I'm afraid, whilst I personally have watched a large individual consuming the contents of a great crested grebe egg many moons ago.
No different to your Fisheries and Game department labelling European Starling and House Sparrow as invasive unwanted pests.

I'm open to correction, but any observation of a red-eared slider feeding on bird eggs would be previously unknown to science, so obviously not a common occurrence by any means. A wild red-eared slider foraging on land would also be a first.

If the egg was in the water, then the turtle may not have been solely responsible for its fate. Perhaps even a careless grebe parent could have been to blame.

A red-eared slider would have to get each individual egg into the water in order to predate a grebe nest. Nothing like a fox or mustelid which could likely (easily) devastate multiple nests in a matter of minutes.

Red-eared sliders are invasive in New England, too, and I'm not saying that invasive species should be ignored. But nobody accuses red-eared sliders of devastating native ducks, and people are more concerned about them outcompeting native turtles.
This isn't a concern in the UK, but I listed some likely potential threats that they pose.

 

[Avon Avians]

The local angling club taking pot shots at it with catapults, blaming it's prescence on dwindling fish numbers ( but fishermen do exaggerate ).

Red-eared sliders rarely even bother to chase goldfish in backyard ponds, so they are unlikely to even attempt to catch fish in something like a river (preferring to pick off the sluggish, the sick, and the dead or dying).

I might see them competing with carp for food resources, though.

 

[Avon Avians]

True, and also the turtles could also be a disease vector. Anything that has been in captivity for an extended amount of time has the potential to be exposed to disease that wild animals may not normally encounter.

And since red-eared sliders originate outside of Europe, they probably carry nonnative microorganisms anyway.

 

[Joern Lehmhus]

Here in Germany, nonnative red-eared sliders are often found in city ponds where people dumped them as unwanted pets. summer temperatures in some cities in southern Germany might be warm enough for reproduction - but that might not be the case in the open landscape yet . however , itf they start to breed tehr e, they may be a real problem for reintroduction projects of European pond turtle, Emys orbicularis.
In some city ponds with high numbers of red-eared sliders there seems to be serious toll on ducklings and very young goslings by red-eared sliders, and sometimes the webbed feet of larger waterfowl are attacked - I don´t have exact data on that, only seen incidences and an attack on the foot of an adult greylag goose.
But in these city ponds there is generally a much too high number of waterfowl , and conditions for rising young are bad anyway, with rats , free running dogs , beech martens, foxes , Carrion crows and grey heron, in some areas also raccoons. There also is nearly no vegetation in the water at such sites due to overgrasing by waterfowl...I think the survival of young red-eared sliders may also be heavily influenced und er these conditions.

However, I was in northern China , province Shaanxi, and in Beijing some time ago... in Shaanxi we saw high numbers of red-eared sliders in seminatural park landscapes and river edges beside large cities. There , in contrast to Germany , the majority of the red-eared sliders were fairly young, but full grown adults were also around and you got the impression of growing populations.
I think this is interesting (though no good news) ...