The remote island of Socorro supports a unique diversity of birdlife, including several endemic species, and consequently is of high conservation importance (4). This island, along with several others in the Revillagigedo chain, was designated a biosphere reserve in 1994 and, as a direct result of this, several conservation measures have been implemented that aim to restore and preserve the island’s landscape. Programmes have begun to remove sheep and feral cats from the island, and should stimulate the regeneration of the forest, whilst diminishing the threat of predation on the island’s birds (6). The number of sheep on the island has already been successfully reduced to less than 300, with further culls planned (9) (10). Furthermore, a nest-box provision programme for the Socorro parakeet has begun, and a captive breeding programme has been established, which will be used as a last ditch attempt to save the species if the natural population drops to critical levels (6) (10).