Expanding range, ecological impact, and conservation challenges of the invasive Red-eared Slider (Trachemys scripta elegans) in West Bengal, India

Abstract

The Red-eared Slider (Trachemys scripta elegans), among the most frequently trafficked species in the international
live-animal trade, is recognized as a globally significant invasive species. During a 2024 chelonian survey in the
lower Gangetic Plain, an internationally recognized turtle priority area, we encountered numerous individuals of T. s.
elegans in southern West Bengal. One individual was in the Kangsabati River, Paschim Medinipur District, and others
were in the Parashnath Temple pond in Kolkata, in both instances coexisting with native turtles. The survey also
documented the expanded range of T. s. elegans in West Bengal and provided the first photographic documentation
of the Indian Tent Turtle (Pangshura tentoria) from temple pond in the state. The occurrence of this invasive species
raises concerns about potential impacts on native turtle populations and freshwater aquatic ecosystems. we suggest the
implementation of comprehensive surveys across West Bengal to identify the distribution of exotic turtle species in
native habitats and apply appropriate management strategies.