We discuss the results of a recent trip to the isolated Swan Islands, Honduras. We include habitat notes for each of the reptilian species we encountered. Also, we compare nine of the 13 reptilian species previously reported from these islands with the only previous reptilian species list that contains natural history notes. Comparisons between our 2012 experiences and those of a 1912 trip demonstrate that the following changes have occurred in the past century: three lizard species have been introduced by humans; two of the four island endemic reptilian species remain common, as they were in 1912; one endemic lizard species appears to have declined drastically in numbers; and the single endemic snake species remains as poorly known now as it was in 1912.