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hmm, I was convinced that ewerything that is larva in terms of lepidoptera is catterpilar. And the thing on image surely is not catterpilar.

Othervise the tree structure is for known things, I mean I can tell soomething is catterpilar even before I knov its id. If I dont know I leave it empty. See:http://agrozoo.ne...&l2=en
first dropdown: animals/wild/bugs/...
In search mode you can anytime pick higher level too.