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Destructive invaders: Calico crayfish threaten species diversity | DW Documentary
They eat and reproduce at record speed - calico crayfish. In its quest for more information about the species, this report finds tens of thousands of crayfish in just one pool along the upper Rhine River. Can this invasive creature still be stopped? The last remaining habitats of amphibians and dragonflies are at risk. Calico crayfish are ...
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