The land external to the main entrance is owned by the WWF (UK), and access is often denied by the Windsor Research Centre who act as their proxy.

[2] The caves contain a major bat roost that hosts 12 or so species including Mormoops blainvillii, Pteronotus parnellii, Glossophaga soricina, Artibeus jamaicensis and Ariteus flavescens.

[1] Invertebrates include springtails of the species Troglopedetes jamaicanus, fungal gnats, troglobitic spiders (Nesticidae), larval Neodytomyia farri and the invasive roach Periplaneta americana.

[1] In the main bat roost there is a mound of guano over two metres high, directly under a particularly good roosting-spot.

[1] The deeper strata of this deposit may record the climate of the island for periods that could extend back for thousands of years.