Pterodroma cookii
Silhouette: Kimberly Haddrell · PhyloPic
In 3 days ~10% in a week ~30%
Cook's petrel (Pterodroma cookii) or tītī (Māori), blue-footed petrel, is a Procellariiform seabird endemic to New Zealand. It is a member of the gadfly petrels and part of the subgenus Cookilaria Bonaparte, 1856, which includes the very similar Stejneger's petrel.
One of the smallest petrels, Cook's petrel is typically 25–30 cm (9.8–11.8 in) in length with a 65–66 cm (26–26 in) wingspan and a weight of around 200 g (7.1 oz). Its colouration is typical of gadfly petrels: pale grey upperparts with a dark grey "M" on the wings and white underparts.
The bill is long and black with tubular nostrils on both sides. As in all members of the order Procellariiformes, this nostril configuration enables an exceptionally acute sense of smell, which the birds use to locate food and nest sites in the dark.
Cook's petrel feeds mostly on fish and squid, with some crustaceans taken. The species is highly pelagic except when nesting. Cook's petrel breeds only in New Zealand on three small islands: Little Barrier Island, Great Barrier Island, and Codfish Island. The breeding season is the southern summer, from October to May. It nests in burrows and rock crevices... Wikipedia →
Nocturnal flight call0:08
New Zealand · 2022
© Nathan El · XC776936 · CC BY-NC-SA 4.0
Recording0:10
New Zealand · 2022
© Oscar Dove · iNaturalist · CC BY 4.0
Recording0:02
New Zealand · 2023
Awhesian · iNaturalist · CC0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cabo Pulmo National Park | 🇲🇽 Mexico | |
| 2 | Rakiura National Park | 🇳🇿 New Zealand | |
| 3 | Fiordland National Park | 🇳🇿 New Zealand |
Rare
Under 5% of wildlife watchers report a Cook's Petrel sighting in Cabo Pulmo National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 84th most-seen of the 100 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
September
In that month about 20% of wildlife watchers report a Cook's Petrel in Cabo Pulmo National Park on a given day, against under 5% in October to June, the lowest months. That is one of Cabo Pulmo National Park's wettest months, with about 120 mm of rain against almost none in April. July and August have too few records to rate.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Cook's Petrel sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 parks where we can rate Cook's Petrel sightings, Cabo Pulmo National Park has the highest daily chance: under 5%. Next come Rakiura National Park (New Zealand, under 5%) and Fiordland National Park (New Zealand, under 5%).
GBIF citizen-science records
It is estimated from how often the Cook's Petrel is recorded against all the birds logged in Cabo Pulmo National Park (10 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
