European green woodpecker hole is excavated in a tree; four to six eggs are laid which hatch after 19–20 days. The European green woodpecker measures 30–36 cm in length with a 45–51 cm wingspan. Both sexes are green above and pale yellowish green below, with yellow rump and red crown and nape; the moustachial stripe has a red centre in the male but is solid black in the female. The lores and around the white eye are black in both male and female, except in the Iberian race "P. v." subsp. "sharpei", in which it is dark grey and males have only a
How the Snake Lost Its Legs of each animal's structures and organs, ecology and behaviour. The main text is supported by an accurate glossary and thorough index. Glossary terms are printed in boldface in the text, a helpful feature, while the glossary, like the text, is cited to the key research papers on which the book is based. The book thus provides a wide overview of evo-devo, with guidance on how to read more deeply on any chosen aspect. The book was published by Cambridge University Press as a paperback in 2014 (). The main text is 148 pages, with an 8-page glossary of evo-devo, and