Аннотация:The North American terrapin, the red-eared slider, has globally recognized invasive status. We built a newextensive database using our own original and literature data on the ecology of this reptile, representinginformation on 1477 water bodies throughout Eurasia over the last 50 years. The analysis reveals regions ofearliest introductions and long-term spatio-temporal dynamics of the expansion covering now 68 Eurasiancountries, including eight countries reported here for the first time. We established also long-term trendsin terms of numbers of terrapins per aquatic site, habitat occupation, and reproduction success. Ourinvestigation has revealed differences in the ecology of the red-eared slider in different parts of Eurasia. Themost prominent expression of diverse signs of invasion success (higher portion of inhabited natural waterbodies, higher number of individuals per water body, successful overwintering, occurrence of juvenileindividuals, successful reproduction, and establishment of populations) are typical for Europe, West Asiaand East Asia and tend to be restricted to coastal regions and islands. Reproduction records coincide wellwith the predicted potential range based on climatic requirements but records of successful winteringhave a wider distribution. This invader provides an excellent and possibly unique (among animals)example of wide alien distribution, without the establishment of reproducing populations, but throughthe recruitment of new individuals to rising pseudopopulations due to additional releases. Therefore,alongside the potential reproduction range, a cost-effective strategy for population control must take inaccount the geographical area of successful wintering.