After the fateful introduction of domestic rabbits in 1903, which nearly denuded the island of vegetation in the next few years, the birds probably declined rapidly.

Supposedly, there were 1500 still alive in April 1915 as reported by the USCGC Thetis expedition (Clapp et al., 1996), but a thorough 1911 census by the State University of Iowa expedition had found only "a few" (Dill & Bryan, 1912), as did a brief visit in February 1916.

As land bird populations on Laysan fluctuate heavily and because there was considerable poaching for the Japanese millinery trade in the 1910s, the supposed 1915 figure cannot be discounted, but it seems highly improbable.

At any rate, the 1923 expedition by the USS Tanager (AM-5) reported only one unconfirmed sighting which seems to have been erroneous (Olson, 1996).

As the vegetation disappeared, the bird suffered increased egg predation by Laysan finches (Telespiza cantans), ruddy turnstones (Arenaria interpres) and bristle-thighed curlews (Numenius tahitiensis), as well as increased competition for food and nesting habitat; a small patch of tree tobacco (Nicotiana glauca) was the only locality left where the millerbird, the Laysan rail (Porzana palmeri) and the Laysan honeycreeper (Himatione fraithii) could nest with a reasonable chance of success.