
Helicoverpa armigera - With green poo
The green poo seems to be "normal", although in other caterpillars it is often blackish-brown. The youngster in this image had been feeding on cucumber and salad for a week, but was originally found on strawberries. Below is the same animal a week earlier, feeding on strawberry and (hence?!) with red poo :o)

The cotton bollworm is a moth, the larvae of which feed on a wide range of plants, including many important cultivated crops. It is a major pest in cotton and one of the most polyphagous and cosmopolitan pest species. It should not be confused with the similarly named, related species "Helicoverpa zea".