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Rooks feed on the ground, predominately feeding on earthworms and insect larvae, which the bird finds by probing the soil with its strong bill. It also eats cultivated cereal grain, smaller amounts of fruit, acorns, small mammals such as voles, and the eggs of ground-nesting birds.
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www.newworldencyclopedia.org/entry/Rook_(bird)
www.newworldencyclopedia.org/entry/Rook_(bird)
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In tests, four of the birds displayed the astonishing ability to devise tools to achieve a task. ... Although New Caledonian crows, from the South Pacific, use sticks to extract grubs from the ground, this is the first time rooks have ever been seen making and using tools, according to a paper published yesterday.
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www.dailymail.co.uk/sciencetech/article-1187429/Rook-ho...
www.dailymail.co.uk/sciencetech/article-1187429/Rook-hook-proves-bird-brains-equal-monkeys.html
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Aptly named zoologist Christopher David Bird of University of Cambridge showed that rooks, ... The birds appeared to calculate how high the water had to rise, and put in only enough stones to raise the water to that level, not stopping to try to reach the worm after each stone. They also figured out quickly that larger...
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articles.latimes.com/2009/aug/08/science/sci-birds8
articles.latimes.com/2009/aug/08/science/sci-birds8
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Regarding this headline, "BIRD BRAIN: Rooks Are Latest Birds To Use Tools." Latest birds to use tools? How long have these birds existed? It is more appropriate to say that these are the latest we have found that have the ability to use tools.
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www.huffingtonpost.com/2009/05/26/rooks-are-latest-bird...
www.huffingtonpost.com/2009/05/26/rooks-are-latest-bird-to-_n_207477.html
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It is often said that if you see a flock of crows that they will be Rooks. This is not strictly true because Carrion Crows do form flocks, but what is true is that Rooks nest in close-knit ... In the winter, the British population is joined by birds from Scandinavia and the near-continent, such as Germany and Holland...
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www.garden-birds.co.uk/birds/rook.htm
www.garden-birds.co.uk/birds/rook.htm
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The rook bird is a member of the crow family. Learn more about the rook bird at HowStuffWorks. ... Rooks nest in tree tops in large colonies, or rookeries, that often number a thousand birds or more. The nests are built of twigs lined with straw. From three to five blue eggs blotched with brown are laid in early spring.
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animals.howstuffworks.com/birds/rook-info.htm
animals.howstuffworks.com/birds/rook-info.htm
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The Rook is one of our most familiar and widespread birds. ... They held the majority (about 85%) of the rookeries, but when Dutch elm disease wiped out over 99% of the elms in the early 1970s, we feared that their loss might lead to a severe reduction in Rooks, but we had underestimated their adaptability and resourcefulness...
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www.birdsofbritain.co.uk/features/mao-mar-01.htm
www.birdsofbritain.co.uk/features/mao-mar-01.htm
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Hand-reared rooks are adept at using tools and can even make their own if they can get their claws on the right materials. ... The birds, which belong to the corvid family along with crows, ravens and magpies, have been caught on video demonstrating tool skills that rival those of more sophisticated animals such...
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www.guardian.co.uk/science/2009/may/26/tool-use-birds-r...
www.guardian.co.uk/science/2009/may/26/tool-use-birds-rooks-intelligence
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Rooks are distinguishable from crows because of their white bills near their faces. Rooks are colonial birds, nesting in small stands of trees year after year. They also remain as a flock when feeding. In the UK an old birdwatchers saw goes 'A rook on his own be a crow, and a group of crows be rooks'.
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www.earthlife.net/birds/crows.html
www.earthlife.net/birds/crows.html
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