Alpine accentor Alpine accentor The alpine accentor ("Prunella collaris") is a small passerine bird. The word "accentor" is from post-classical Latin and means a person who sings with another. The genus name "Prunella" is from the German "Braunelle", "dunnock", a diminutive of "braun", "brown", and the specific "collaris" is from Latin "collum", "neck". This species, along with the Altai accentor is sometimes separated from the other accentors, into the genus "Laiscopus". This is a robin-sized bird at 15-17.5 cm in length, slightly larger than its relative, the dunnock. It has a streaked brown back, somewhat resembling a house sparrow, but adults have
Bird colony (Enantiornithes), in sediments from the Late Cretaceous (Maastrichtian) of Romania. Approximately 13% of all bird species nest colonially. Nesting colonies are very common among seabirds on cliffs and islands. Nearly 95% of seabirds are colonial, leading to the usage, seabird colony, sometimes called a rookery. Many species of terns nest in colonies on the ground. Herons, egrets, storks, and other large waterfowl also nest communally in what are called heronries. Colony nesting may be an evolutionary response to a shortage of safe nesting sites and abundance or unpredictable food sources which are far away from the nest sites. Colony-nesting birds