2005, P. E. Berry, R. Riina, Insights into the diversity of the Pantepui flora and the biogeographic complexity of the Guayana Shield, Ib Friis, Henrik Balslev (editors), Plant Diversity and Complexity Patterns, page 153,
Once a population becomes adapted to the tepui summit environment, it is more likely to colonize other areas with similar environmental conditions, so it would need to disperse between tepui summits to expand its geographical range.
Source: wiktionary
One of the most dominant landscape features in the Gran Sabana is a flight of planation surfaces rising from modern sea level to the summits of the high tepui (Briceño and Schubert 1990).
Source: wiktionary
On the other hand, because birds and small mammals are relatively rare on tepuis, the principal potential vertebrate food for snakes on tepui summits would seem to be frogs, most of which are nocturnal (e.g., species of Tepuihyla, Stefania, Hypsiboas, Pristimantis, Anomaloglossus, and Otophryne).
Source: wiktionary