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Living in the pond in front of the Palacio de Cristal, Parque del Retiro in Madrid, Spain.
Not silly at all !! And yes that's right - it was in the Late eightys when there was a Run in the yellow bellied sliders as pets many of them where released, then in the ninetys the red eared sliders became even more popular - native to USA they rapidly became a threat for the native European tortoises as concurents !
Now this is probably a silly question but are they invasive or native to Spain? I kinda imagined some had been released as pets, but saw so many around Madrid that I began to question myself.
These are yellow bellied sliders except the very left One on Top of the other that's a Red eared slider ...