Titanoboa cerrejonensis, an extinct species, was the largest snake ever discovered, measuring up to 42 feet long and weighing over a ton. It lived during the Paleocene epoch in tropical rainforests of present-day Colombia, thriving in hot, humid environments. Its diet likely included large prey like crocodiles.

Titanoboa cerrejonensis is native to the region that is now northeastern Colombia, specifically the area around the Cerrejón coal mine in the La Guajira Department. This region was part of the Paleocene epoch rainforest approximately 60 million years ago.

During the Paleocene epoch, the habitat of Titanoboa was characterized by warm and humid climatic conditions, typical of tropical rainforests. The average temperature was higher than today's tropical climates, estimated to be around 30-34°C (86-93°F). The region was a dense rainforest with abundant water bodies.

Titanoboa occupied an apex predator niche within its ecosystem, primarily inhabiting freshwater environments such as rivers and swamps. Its large size allowed it to prey on a variety of animals, including crocodilians and large fish. The rainforest environment provided ample cover and hunting grounds for this massive snake.