There is a family of flies, Tachinidae, which consists of different species of parasitic flies, one of which is Epalpus signifier. If you look at enough dandelions this time of year, you are likely to spot one — their white rump is a distinctive identifying feature. This fly is technically a parasitoid, and as such, spends most of its life attached to or within a host organism (Noctuid moth caterpillar) , getting nourishment from it. Unlike a parasite, it eventually kills or consumes its host
It’s hard to believe, but even after Irene, several inches of snow and an occasional night that’s below freezing, there are still butterflies and moths to be seen. Yesterday this sulphur butterfly (probably clouded, Colias philodice) was flying from dandelion to dandelion, sucking up nectar with its long, black proboscis. Clouded sulphur and orange sulphur butterflies, two different species, are similar looking, and on top of that, they even hybridize, so distinguishing between the two is often difficult, at best. Both species have several broods in a summer; you can see them flying in fields and along roadsides from spring to fall.