Some of this stuff is just fun. The leafhopper feeds on the sap of the tree. And the Gecko will stop by and wait to be fed. The narrator explains that scientists have not determined why this happens, perhaps the Gecko keeps aware predators? That seems somewhat flimsy as a guess to me but what do I know. The narrator does say that the sweet honeydew is what remains from the sap once the leafhopper has extracted the protein.
Related: Macavity’s a Mystery Cat – Swimming Ants

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