Guadalupe Storm-petrel

The  Guadalupe Storm-petrel (Oceanodroma macrodactyla) is a small seabird of the storm-petrel family Hydrobatidae.

It bred on Guadalupe Island, Mexico, where it was formerly abundant. The introduction of feral cats to the island decimated the population during the late 19th century; the last 2 specimens were collected between May 2 and May 5, 1911 (Townsend, 1923) and the last record of a breeding bird was in 1912. In 2000, its former breeding areas were finally surveyed at the correct time and it was concluded that the species was long extinct - probably since some time in the 1910s -; the official classification (BirdLife International, 2006) has not been updated yet.

As opposed to the other storm-petrels found in the area, this species bred much earlier. Eggs were laid in burrows below the Guadalupe Island Monterey Pine (Pinus radiata var. binata)/Island Oak (Quercus tomentella) grove at the island's northern summit; incubation took place in late May/early June (Kaeding, 1905).

3 species of lice have been found to parasitize the Guadalupe Storm-petrel: the menoponids Longimenopon dominicanum and Austromenopon oceanodromae, and the ischnoceran Halipeurus raphanus (Mey 1990, ). The second also occurs on some other storm-petrels, and the third was also found on the Ashy Storm-petrel. The first of these species, on the other hand, has to date not been found on other birds and may be a case of coextinction.