"We present a case where the atavistic phenotype is adaptive, with the derived allele of the M locus in H. misippus producing a mimetic wing phenotype. We show that two large insertions of 2.4 and 4.3 kb are found in the dominant allele of the M locus and that these are formed by multiple TE insertions."

https://academic.oup.com/mbe/article/41/3/msae041/7613881?login=false#443390541