Hey @marcusantoniu26, indeed there are a lot of science references in this piece. Actually, Arctiinae is a large subfamily of moths, the best-known of which is the so-called "Tiger moth." Regarding the pyrrolizidine alkaloids referred to, they are toxic compounds present in many plants including ragwort that function as a defense against predators. Arctiids are capable of retaining these compounds in their body for the same purpose.