European green woodpecker main food of the European green woodpecker is ants of the genera "Lasius" and "Formica" for which it spends much of its time foraging on the ground, though other insects and small reptiles are also taken occasionally. The bird's distinctive, elongated, cylindrical droppings often consist entirely of ant remains. At ant nests, it probes into the ground and licks up adult ants and their larvae. They have tongues that wrap to the back of their head. Green woodpeckers will often forage in short grazed or mown permanent grasslands where the availability of ant nests is high. A study of a
An Essay on the Nature and Significance of Economic Science on economic methodology in generating a range of tightly-argued, radical implications from a simple definition, for example in admitting an "aspect" of behaviour (rather than a list of behaviours) but not limiting the subject-matter of economics, provided that the influence of scarcity impinges on these (pp. 16–17). The broad behavioural definition is credited for its consistency with the expanding boundaries of economics decades later. In this Robbins both narrows the definition of economics, thereby demonstrating the usefulness of deduction, and opens up the subject-matter of economics. Robbins's "Essay" is one of the most-cited works on the methodology and philosophy of