06:51 GMT +3 hours29 November 2014
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Faithful Animals, But Rare

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© RIA Novosti. Popov
Researchers listed species that tend to bond as monogamous couples, but many are still threatened with extinction, according to the International Union for the Conservation of Nature. The list includes gibbons listed in the Red Data Book, geese, dholes (photo), marine angelfishes, and albatrosses.

Researchers listed species that tend to bond as monogamous couples, but many are still threatened with extinction, according to the International Union for the Conservation of Nature.