Critically Endangered
Guadalupe storm petrel
Hydrobates macrodactylus
The Guadalupe storm petrel is a small seabird of the storm petrel family Hydrobatidae.
The tubenose
Guadalupe storm petrel is a tubenose seabird in the family Hydrobatidae (order Procellariiformes) — Hydrobates macrodactylus.
Range and habitat
It bred only on Guadalupe Island off Baja California, Mexico, and presumably ranged throughout the region.
GBIF currently lists 9 occurrence points. Those points follow where people logged the taxon — museum drawers and surveys included — not a closed range boundary.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Diet and breeding
The single egg, white with a faint ring of reddish-brown and lavender speckles around the blunt end, was laid in burrows maybe 15 in (35–40 cm) long, below the Guadalupe pine (Pinus radiata var. Binata)-island oak (Quercus tomentella) cloud forest on top of Mount Augusta. Even though little data is available on Hydrobates breeding, incubation was presumably 42 days or so in this species, just as in similar-sized relatives.
This would mean that egg-laying took place from early February to March, and that in April–May, unfledged young were present in most active burrows. Just as in their relatives, the egg was incubated a few days by either parent, after that the other took over, the relieved bird taking to the sea to feed itself for the next incubation stint.
In crisis
It has been assessed as Critically Endangered or possibly extinct.
Guadalupe storm petrel is Critically Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Guadalupe storm petrel, Wikidata item Q28070805 and GBIF occurrence geography. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.
