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Sira poison dart frog
''Ranitomeya sirensis'' is a species of poison dart frog found in the Amazonian rainforests of northern Bolivia (Pando Department), westernmost Brazil (Acre), and eastern Peru.
''R. sirensis'' is known as the Sira poison frog.〔 ''R. sirensis'' is kept as a pet by herpetoculturists〔 and is considered to be one of the more difficult poison dart frogs to keep due to its relative rarity and the delicate nature of its tadpoles.
== Poison ==
Like most ''Ranitomeya'' species, ''R. sirensis'' is a mildly toxic poison dart frog.〔http://www.dendrobase.de/index.php?gattung=Ranitomeya&art=sirensis&id=12220〕 Its skin secretes small amounts of pumiliotoxins which coat the frog and cause pain and mild muscle spasms if the frog is handled carelessly. The symptoms may be more severe if the frog is ingested, but unlike the ''Phyllobates'' and ''Oophaga'' species, ''R. sirensis'' secretes the comparatively mild pumiliotoxin C in very small quantities due to its tiny size. As a result, ''sirensis'' mostly rely on their agility, speed, and ability to take shelter in the leaf litter or in dense foliage for protection.
''R. sirensis'', as with all dendrobatid frogs, loses its poison in captivity. The reason for the loss of its toxicity is thought to be the removal of a toxic insect or other invertebrate from the diet. Scientists have determined that members of the genus ''Phyllobates'' derive their dangerously potent toxins from local melyrid beetles.〔( Most poisonous creature update: mystery solved )〕 As ''R. sirensis'' is much less toxic than the ''Phyllobates'' species, the source of its toxin is not thought to be melyrid beetles; instead, it is likely an invertebrate that remains undiscovered.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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