The remarkable didunculus occurs in Samoa, and after the introduction of cats and rats, which preyed upon it, was compelled to change its habits, dwelling in trees instead of on the ground.
Of the extremely limited Samoan fauna, consisting mainly of an indigenous rat, four species of snakes and a few birds, the most interesting member is the Didunculus strigirostris, a ground pigeon of iridescent greenish-black and bright chestnut plumage, which forms a link between the extinct dodo and the living African Treroninae.
The toothbilled pigeon (Didunculus) is restricted to Samoa.
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