Blood Island

The Blood Island is a island (two times larger than Skull Island), it was first formed by an undersea volcano, which erupted and made a large island around 310 million years ago that later became Future Island. This island is also known for its collection of prehistoric animals, with most prehistoric animals living on the island being herbivores (plant eaters), they either survived extinctions and are always native to the island or were brought back and were introduced to the island by ancient aliens (since these aliens hoped that these animals will thrive and live on once again).

Also, here's the examples of species on Blood Island.