How poisonous amphibians evolve bright colors to warn predators off?

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https://www.newscientist.com/article/2364724-how-poisonous-amphibians-evolve-bright-colours-to-warn-predators-off/

Evolutionary transitions from camouflage to aposematism: Hidden signals play a pivotal role

Read the full research paper here:

https://www.science.org/doi/10.1126/science.ade5156