these similarities, treatment for batrachotoxin poisoning might best be modeled after, or based on, treatments for one of these poisons. Treatment may also be modeled after that for digitalis, which produces somewhat similar cardiotoxic effects. While it is not an antidote, the membrane depolarization can be prevented or reversed by either tetrodotoxin (from puffer fish), which is a noncompetitive inhibitor, or saxitoxin ("red tide"). These both have effects antagonistic to those of batrachotoxin on sodium flux. Certain anesthetics may act as receptor antagonists to the action of this alkaloid poison, while other local anesthetics block its action altogether by acting as competitive antagonists. Sources Batrachotoxin has been found in four Papuan beetle species, all in the genus Choresine in the family Melyridae; C. pulchra, C. semiopaca, C. rugiceps and C. sp. A. Several species of bird endemic to New Guinea have the toxin in their skin and on their feathers: the blue-capped ifrit (Ifrita kowaldi), little shrikethrush (aka rufous shrike-thrush, Colluricincla megarhyncha), and the following pitohui species: the hooded pitohui (Pitohui dichrous, the most toxic of the birds), crested pitohui (Ornorectes cristatus), black pitohui (Melanorectes nigrescens), rusty pitohui (Pseudorectes ferrugineus), and the variable pitohui, which is now split into three species: the northern variable pitohui (Pitohui kirhocephalus), Raja Ampat pitohui (P. cerviniventris), and southern variable pitohui (P. uropygialis). While the purpose for toxicity in these birds is not certain, the presence of batrachotoxins in these species is an example of convergent evolution. It is believed that these birds gain the toxin from batrachotoxin-containing insects that they eat and then secrete it through the skin. Batrachotoxin has also been found in all described species of the poison dart frog genus Phyllobates from Nicaragua to Colombia, including the golden poison frog (Phyllobates terribilis), black-legged poison frog (P. bicolor), lovely poison frog (P. lugubris), Golfodulcean poison frog (P. vittatus), and Kokoe poison frog (P. aurotaenia). The Kokoe poison frog used to include P. sp. aff. aurotaenia, now recognized as distinct. All six of these frog species are in the poison dart frog family. The frogs do not produce batrachotoxin themselves. Just as in the birds, it is believed that these frogs gain the toxin from batrachotoxin-containing insects that they eat, and then secrete it through the skin. Beetles in the genus Choresine are not found in Colombia, but it is thought that the frogs might get the toxin from beetles in other genera