A nesting colony exists on Clarion Island which hosts a military base. The nesting birds are routinely predated by invasive mammals which are being continually introduced. Military personnel and general activity on the base also disturbs the birds. As of 1988, the date of the last count, this population was down to 30 nesting pairs. The largest population in the east pacific is on Guadalupe Island which also hosts a military base. This colony may also be threatened. (Pitman 160)
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