Grey-headed woodpecker Concern" rating is primarily based on the large distribution of the species. The grey-headed woodpecker is long and weighs . Specimens of the more widespread of the two Eastern subspecies, "P. c. jessoensis", are usually a little larger and heavier than individuals from the type locality. On average, it is somewhat smaller and lighter than the European green woodpecker. In the field, this distinction in size is difficult to make. Its size is approximately that of a Eurasian collared dove. Grey-headed woodpeckers have uniformly olive green upperparts, transitioning across the neck to a light grey, the head being that latter
Proposals for an English Academy Hartlib spoke of a pilot scheme he had run. In the years 1648–1650 Balthazar Gerbier revived the idea of an academy on Kynaston's lines in a series of pamphlets. Peter Chamberlen the third suggested an academy to oversee public welfare, as part of his reforming scheme. Around 1660 John Evelyn and Robert Boyle were interested once more in the idea of an academy. Evelyn's experience abroad included a meeting of the Umoristi, an academy in Rome devoted to verse and linguistic matters. Language now became aspect of the "English Academy" issue that continued to resonate with English literati, and was