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Birds in eastern Greece in southeast Europe are also included in this subspecies by some authors, [12] but others include them in nominate C. c. corax. [15] Slightly larger than the nominate subspecies, but has relatively short throat hackles.
On average, captive animals (especially mammals) live longer than wild animals. This may be due to the fact that with proper treatment, captivity can provide refuge against diseases, competition with others of the same species and predators. Most notably, animals with shorter lifespans and faster growth rates benefit more from zoos than animals ...
Terns are a group of generally medium to large seabirds typically with grey or white plumage, often with black markings on the head. Most terns hunt fish by diving but some pick insects off the surface of fresh water. Terns are generally long-lived birds, with several species known to live in excess of 30 years.
Very large numbers are caught in nets along the Mediterranean coast of Egypt. It is estimated that in 2012, during the autumn migration, 3.4 million birds were caught in northern Sinai and perhaps as many as 12.9 million in the whole of Egypt. [14] This species over recent years has seen an increase in its propagation in
Canaries were first bred in captivity in the 17th century, having been brought to Europe by Spanish sailors. Monks started breeding them and only sold the males (which sing). This kept the birds in short supply and drove the price up. Eventually, Italians obtained hens and were able to breed the birds.
The behavior spreads among the birds by imitation. [11] In captivity some will spontaneously dance to music with a variety of unique moves. [12] These birds are very long-lived, and can live upwards of 70 years in captivity, [13] [14] although they only live to about 20–40 years in the wild.
There are a small few slightly heavier flying birds in the Eurasian portions of the range. [13] [14] Among standard measurements, the wing chord is 60 to 73 cm (24 to 29 in), the tail 16 to 21 cm (6.3 to 8.3 in), and the tarsus 13 to 14.9 cm (5.1 to 5.9 in) long.
Grey parrots may live for 40–60 years in captivity, although their mean lifespan in the wild appears to be shorter — approximately 23 years. They start breeding at an age of 3–5 years and lay 3–5 eggs per brood.