Range and population
Gallicolumba xanthonura occurs widely in the Northern Mariana Islands (to USA) and
on Yap in the Federated States of Micronesia, where it inhabits native
forest, secondary forest, plantations, introduced tangan-tangan Leucaena
leucocephala thickets and habitat mosaics including fields, but appears more
frequent in native forest than in disturbed habitats1,2,3,4.
It has become extirpated from
) owing to predation by the introduced brown tree snake Boiga
irregularis, and although single birds turn up once every few years, these
are almost certainly individuals dispersing from the
, 60 km to
the north5. The highest population is probably on
where c.2,400 birds were
estimated in 19822. It is fairly common on
where up to 72
birds/km2 were recorded in limestone forest in 1991-19931.
It is rare on
where the population was estimated at c.195 in 19843.
The species can still be legally hunted in the Northern Mariana Islands5
and must be affected by habitat loss, but the greatest threat would come from
the accidental introduction of B. irregularis to other islands in
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