The island known for its unique wildlife and part of the United Kingdom is Great Britain. This area is home to iconic species such as the red squirrel and the European otter, as well as numerous bird species. The specific conservation efforts focus on preserving these unique ecosystems, which offer a glimpse into the biodiversity of the region. The varied habitats across Great Britain, including heathlands, woodlands, and wetlands, provide a range of niches for these species to thrive.