Galapagos Day 4+: Land iguana

Galapagos Day 4+: Land iguana

On our hike to Volcan Chico on Isabela yesterday, we saw our first land iguana, Conolophus subcristatus, in a dry habitat beneath scrubby shrubs. Another species found only on the Galapagos Islands, these iguanas can interbreed with the marine species (surprising since they are a different genus) but the hybrid offspring are sterile. This suggests that the land and marine iguanas shared a common ancestor, a question that could be answered by DNA testing.


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