[1][2][3] In common English, they are known as the crow family, or, more technically, corvids. Ravens typically use larger trees in denser forest.[19]. The known prehistoric corvid genera appear to be mainly of the New World and Old World jay and Holarctic magpie lineages: In addition, there are numerous fossil species of extant genera since the Mio–Pliocene, mainly European Corvus.[a].

Corvids are reservoirs (carriers) for the West Nile virus in the United States. Some groups of roosting corvids can be very large, with a roost of 65,000 rooks counted in Scotland. They have plain, often glossy plumage that may be monochromatic or contrastingly patterned. [29] A meta-analysis testing how often birds invented new ways to acquire food in the wild found corvids to be the most innovative birds. The increase in available anthropogenic food sources is contributing to population increase in some corvid species.[19]. The sexes are very similar in color and size. Crows in Japan have learned to put nuts on roads and wait for cars to crush their hard shells; common ravens are considered the smartest birds ever, as they have a brilliant memory and solve difficult problems working together and learning by their mistakes, magpies can recognize theirselves in a mirror, jays can remember the positions of hundreds of seeds they hide in the woods, and crows are able to remember the facial features of a human. Take your favorite fandoms with you and never miss a beat. [10][11] The jays and magpies do not constitute monophyletic lineages, but rather seem to split up into an American and Old World lineage, and an Holarctic and Oriental lineage, respectively. The nutcrackers were more accurate in their searches than the jackdaws and pigeons. The largest corvids are the common raven (Corvus corax) and the thick-billed raven (Corvus crassirostris), both of which regularly exceed 1,400 grams (3.1 pounds) and 65 cm (26 in). [citation needed], Folklore often represents corvids as clever, and even mystical, animals. See chough; crow; jackdaw; nutcracker; raven; rook. Social organization is highly developed, mutual aid being a strong feature. https://birds.fandom.com/wiki/Corvid?oldid=16273.

[2], Corvids occur in most climatic zones. [14].mw-parser-output table.clade{border-spacing:0;margin:0;font-size:100%;line-height:100%;border-collapse:separate;width:auto}.mw-parser-output table.clade table.clade{width:100%;line-height:inherit}.mw-parser-output table.clade td.clade-label{width:0.7em;padding:0 0.15em;vertical-align:bottom;text-align:center;border-left:1px solid;border-bottom:1px solid;white-space:nowrap}.mw-parser-output table.clade td.clade-fixed-width{overflow:hidden;text-overflow:ellipsis}.mw-parser-output table.clade td.clade-fixed-width:hover{overflow:visible}.mw-parser-output table.clade td.clade-label.first{border-left:none;border-right:none}.mw-parser-output table.clade td.clade-label.reverse{border-left:none;border-right:1px solid}.mw-parser-output table.clade td.clade-slabel{padding:0 0.15em;vertical-align:top;text-align:center;border-left:1px solid;white-space:nowrap}.mw-parser-output table.clade td.clade-slabel:hover{overflow:visible}.mw-parser-output table.clade td.clade-slabel.last{border-left:none;border-right:none}.mw-parser-output table.clade td.clade-slabel.reverse{border-left:none;border-right:1px solid}.mw-parser-output table.clade td.clade-bar{vertical-align:middle;text-align:left;padding:0 0.5em;position:relative}.mw-parser-output table.clade td.clade-bar.reverse{text-align:right;position:relative}.mw-parser-output table.clade td.clade-leaf{border:0;padding:0;text-align:left}.mw-parser-output table.clade td.clade-leafR{border:0;padding:0;text-align:right}.mw-parser-output table.clade td.clade-leaf.reverse{text-align:right}.mw-parser-output table.clade:hover span.linkA{background-color:yellow}.mw-parser-output table.clade:hover span.linkB{background-color:green}. [4] Magpies have been observed taking part in elaborate grieving rituals, which have been likened to human funerals, including laying grass wreaths.

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