The lipocalins that have been identified as biliproteins have been found in a wide variety of insects, but mainly in the order Lepidoptera. Scientists have discovered them in the large white butterfly and a number of moth and silkmoth species, including the ailanthus and domestic silkmoths, giant silkworm moth, tobacco hawk moth, honeycomb moth, and the puss moth. The biliproteins associated with these insect species are the bilin-binding proteins, biliverdin-binding proteins, bombyrin, lipocalins 1 and 4, insecticyanin, gallerin and CV-bilin respectively.  The biliproteins found in the tobacco hawk moth and pussmoth make up a major part of the insects’ haemolymph fluids.
The biliproteins that have been found in other insect orders apart from Lepidoptera still have unknown sequences, and so their lipocalin nature is still open.