Blue Tit, Cyanistes caeruleus (often still Parus caeruleus), is a 10.5 to 12 cm long passerine bird in the tit family Paridae. It is a widespread and common resident breeder throughout temperate and subarctic Europe and western Asia in deciduous or mixed woodlands. It is a resident bird, i.e., most birds do not migrate.
Captured from a WONDERFUL MULTIMEDIA CD-ROM title,
"Eyewitness Encyclopedia of Nature",
Dorling Kindersley Multimedia, 1995