Heterogeneity

Bastimentos Strawberry Poison Dart Frog (Oophaga pumilio). Just one of the many beautiful localities of this small anuran.

Increased ossification visible in the skull of Anotheca spinosa, more commonly known as the Coronated or Crowned Tree Frog.

Crotalus ehecatl, until recently described as C. simus. The species is named after the Aztec god of the wind.

Northern Eyelash Boa (Trachyboa boulengeri)

A diminutive snake found in Colombia, Ecuador, and Panama.

Crested geckos (Correlophus ciliatus) inhabit forests of New Caledonia. They are listed as Vulnerable on the IUCN Red List due to decline in quality and extent of their natural habitat. 

Sun Beetles (Pachnoda marginata peregrina) are insects found in tropical Africa. Adults will eat fruit and blossoms, while larvae consume decomposing leaf litter and rotten fruit. 

Blue Tongue Skink (Tiliqua scincoides). These lizards are native to Australia. Despite their stout appearance they can be swift and agile when chasing live prey. 

Corn snakes (Pantherophis guttatus) originate from North America, but can be found all over the world in the pet trade. Their docile temperament and tendency to feed well on commercially available rodents make them an excellent starter snake for those who are new to the hobby.

African Spurred Tortoise (Centrochelys sulcata). They are the largest mainland species of tortoise, and the third largest species in the world after Galapagos and Aldabra tortoises. 

The Mexican Blind Cavefish (Astyanax mexicanus) may look totally different to the Mexican Tetra (bottom left), but is in fact the same species. Adaptations to life in pitch dark caves such as heightened sense of smell, as well as use of the lateral line organ, have made vision and pigmentation unimportant. 

The two different morphs made this species an excellent candidate for research into circadian rhythms and metabolic processes, which you can read about here.