Pine processionary maximum recorded of . The species flies from May to July. "T. pityocampa" is a highly social organism. Throughout its life cycle, a pine processionary will make several shelters. The first of these are flimsy and temporary, but in the third instar, they build a permanent nest. Once their permanent nest is built, the caterpillars become foragers staying in the vicinity of the nest. The nest has no openings, so caterpillars force themselves through the layers of the shelter. The waste from the larvae's diet accumulates at the bottom of the nest. The pine processionary caterpillar is responsible for most
Animal Health Trust internship and residency training programmes. The Continuous Professional Development (CPD) programme has also expanded in recent years. The AHT publishes papers detailing its research and clinical findings in journals and online, for the veterinary and science professions. It also has its own open-access library. Housing journals, publications and findings, it is available for use by anyone studying animal health. The Animal Health Trust’s veterinary clinics provide referral services to small animal and equine veterinary practitioners. It has two clinical centres: the Centre for Small Animal Studies and Centre for Equine Studies. It also offers diagnostic laboratories and DNA testing services.