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Side-by-Side Comparison

Attribut	Ainley's Storm-petrel	Monteiro's Storm-petrel
Nom scientifique	Hydrobates cheimomnestes	Hydrobates monteiroi
Ordre	Procellariiformes	Procellariiformes
Famille	Hydrobatidae	Hydrobatidae
Statut de conservation	Vulnerable	Vulnerable
Longueur	—	—
Envergure	30,1 cm (11.9 in)	30,6 cm (12.0 in)
Poids	41,15 g (1.45 oz)	45,5 g (1.60 oz)
Régime alimentaire	--	--
Taille de la couvée	1	1
Population Trend	—	—

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Habitat Comparison

Habitats partagés

Aucun(e)

Ainley's Storm-petrel only

Aucun(e)

Monteiro's Storm-petrel only

🏖️ Coastal

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Statut de conservation

Vulnerable

Ainley's Storm-petrel

Vulnerable

Monteiro's Storm-petrel

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About These Birds

Ainley's Storm-petrel

Ainley's Storm-petrel, 19–21 cm, is a recently described species breeding on the Channel Islands off California, present in winter — unusual among storm-petrels which typically breed in summer. Dark overall, white rump with central grey stripe. Vulnerable; small population and restricted range.

Monteiro's Storm-petrel

Monteiro's Storm-petrel, 19–21 cm, breeds exclusively on Graciosa Island in the Azores, wintering in the central North Atlantic. Recently split from Band-rumped Storm-petrel; breeds in a different season (July–November vs March–April for Castro's). Near Threatened; very small island-restricted population.

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