Chordates • Earth.com

Guadalupe storm-petrel

(Oceanodroma macrodactyla)

Description

The paíño of Guadalupe ( Guadalupe Storm Petrel ) is a species of bird procelariforme family Hydrobatidae endemic to the region of the Pacific near the California peninsula.The species has not been sighted for years and may have become extinct.This species is almost indistinguishable from its relative the Northern Paleño.In the field they can not be distinguished apart from their circadian rhythms.When caught the Guadalupe petrel turns out to be slightly larger and has the coverts of the lower part of the wings clearer.It breeds only on Guadalupe Island located along the coasts of the California peninsula ( Mexico ),and presumably extends into the surrounding region.Its breeding season is between those of the local subspecies of the Northern Pale,Oceanodroma leucorhoa cheimomnestes breeding in winter and O.l.Socorroensis that breeds in summer,according to Gause's law.It puts a single white egg dotted with reddish and violet brown specks around its blunt end,in a burrow about 35-40 cm deep,located in the mixed cloud forests of Pinus radiata var.binata ) and Quercus tomentella from the top of Mount Augusta.note 1 By mid-June almost all juveniles have left the burrows.Although there is little data on their reproduction,the incubation probably lasts 42 days,as their relativesthe same size.The development time of the chicks would last between 60 and 75 (-85?) Days,most likely around 65 days.This indicates that the laying would take place from the beginning of February to March,and that between April and May most of the burrows have chicks.As their relatives the eggs are incubated by the two members of the couple,who take turns feeding and the chicks are only fed at night.

Taxonomic tree:

Domain:
Kingdom: Animalia
Phylum:
Class: Aves
Order:Procellariiformes
Family:Hydrobatidae
Genus:Oceanodroma
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