User talk:Emery.86/sandbox
https://en.wikipedia.org/wiki/Talk:Poison_dart_frog#Evolution
in the second paragraph of the section it was said that "his study found that polymorphic poison dart frogs that are less conspicuous are more toxic in comparison to the brightest and most conspicuous species." this was by Wang and Shaffer (2011), however there is another article that contradicts this and a study was done that says the poison from blander frogs was less potent than that of more colorful frogs. this article was from http://www.smithsonianmag.com/science-nature/how-do-tropical-frogs-get-their-stunning-colors-712275/?all
Another note when it comes to sexual selection it is also said that females prefer males with the shiniest skin, so perhaps this could be another piece to mention.
Also there can be many different colors among the species that can eventually become consistent within an area. A study was done in the Amazon forest with 2 colonies of frogs only ten kilometers apart, it showed how if a frog does not recognize a certain pattern or color of the frog it will attack thinking that it is prey. Eventually all the frogs will become one color or pattern after time of realizing they are all essentially the same. http://www.nouvelles.umontreal.ca/udem-news/news/20111121-predators-drive-the-evolution-of-poison-dart-frogs-skin-patterns.html