Zoology - Insects - Hymenopters - Southern wood ant (Formica rufa). This little insect has elongated body, ranging in size from 4 to 12 mm, and well distinguishable head. Antennae are extremely sensitive, particularly in detecting temperature variations. This ant has powerful jaws, enabling it to carry heavy objects. It is widespread in central and northern Europe, North America, Caucasus and Siberia.