Ground nesting processionary caterpillar host trees:
Ground nesting adult moths:
Even though these moths are from ground nesting forms, there is variation in wing patterns between and within the sex. To differentiate from male to female, look at the anal tuft (tip of the abdomen). Females have a large white tip that covers 1/3 of its body, whereas male abdomens are more pointed with a few pale hairs on the tip. They are usually smaller than females.
Egg masses can also be laid on host tree saplings (see below). These saplings were less than a metre high with developing egg masses.
Elevated nesting processionary caterpillar host trees:
Tree hugger adult moths:
Similarly to the ground nesting forms, there is variation of wing patterns between and within the sex. To differentiate between ground nesting and tree hugger moths, colour of the wings are generally light brown in tree-hugger moths compared to ground nesting forms. The most obvious is the colour of the anal tuft scales. Tree-hugger moths have yellow anal tufts and ground nesting forms have white.