Can you guess what these insects are mimicking?

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Title

Can you guess what these insects are mimicking?

Rights

(A) photograph by Andreas Kay (CC BY-NC-SA 2.0)
(B) photograph by Billtacular (CC BY-NC-ND 2.0)
(C) photograph by goldentakin (CC BY 2.0)
(D) photograph by Andreas Kay (CC BY-NC-SA 2.0)
(E) photograph by Green Baron Pro (CC BY-NC 2.0)
(F) photograph by BugMan50 (CC BY-NC 2.0)