Friday, September 22, 2017

Urban animal: curious corvids


The Corvidae is a cosmopolitan family of passerine birds that contains some of the most intelligent birds known to man that display self-awareness, spatial memory and the ability to use tools. In English this bird family is usually known as the crow family after one of its most common members the Carrion crow. Together they are known as corvids after the Latin name for the crow Corvus. These birds with black plumes are not closely related to Black birds.



The Magpie (Pica pica) is now more common in the urban landscape than in its natural half open habitat of hedgerows and scattered trees. These striking bird with black and white plumage- although in the right light the black feathers reveal themselves to be iridescent green and blue- are highly intelligent. The same sheen can be seen on the Carrion crow (Corvus corone). These birds are the same size as the Magpie, they differ in the overall colouration and the long tail. The Common raven (Corvus corax) is another “black” corvid. This bird with a blue sheen is larger than the other two species of corvids. All are opportunistic, omnivorous and intelligent birds.



The Jackdaw (Corvus monedula) is quickly becoming one of the most common birds in urban areas. These gregarious, very intelligent birds have excellent spatial memory and will even recognise human faces. They are not truly black but rather darker and lighter shades of grey. They will often operate in groups. In autumn these family groups merge into larger flocks. It is the smallest corvid size wise.

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