You can look at the picture of gecko poop in this picture. Geckos mainly feed on mosquitoes, and their feces are the corpses of mosquitoes. The white feces are uric acid. You can catch geckos and observe them. When geckos defecate, there is a layer of water outside. After it dries, it will turn into a white part and a black part.
Please remember to distinguish between gecko poop and mouse poop. Rats are omnivorous animals and there should be undigested plant fiber in their feces. The nitrogen-containing waste in geckos is not excreted through the urinary system like humans, but is excreted through the excretory system. Therefore, gecko stool is divided into two parts, the white part is nitrogen-containing waste, and the black part is food residue.
