Sternula saundersi
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~20%
Saunders's tern (Sternula saundersi), sometimes known as the black-shafted tern, is a species of bird in the family Laridae. It is sparsely resident along the shores of the north-western Indian Ocean (namely southern Somalia, Arabian Peninsula, Socotra, Pakistan, Andaman and Nicobar Islands and northern Sri Lanka).
It is a close relative of the little tern, least tern, yellow-billed tern, and Peruvian tern. In non-breeding plumages, the Saunder's tern and the little tern may be almost indistinguishable. The two have been considered by some to be conspecific.
Saunders's tern shares many of the features of its close relative, the little tern, including a white body, a black-tipped yellow bill, and a black cap with a white forehead patch. In its breeding plumage, it distinguishes itself with a straight-bordered forehead patch, possessing more black outer primaries, and duskier colored legs and feet in comparison to the bright yellow legs of the little tern. In non-breeding plumage, the two are very similar.
Saunders's tern is 20–28 cm (8–11 in) long, weighs 40–45 grams (1.4–1.6 oz), and possesses a wingspan of 50–55 cm (20–22 in). It has an average wing length of 16.6... Wikipedia →
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Saudi Arabia · 2022
© David Darrell-Lambert · XC746407 · CC BY-NC-SA 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | iSimangaliso Wetland Park | 🇿🇦 South Africa |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Saunders's Tern sighting in Mumbai on a given day, based on 272 verified sightings from GBIF citizen-science data. It is the 132nd most-seen of the 283 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
July
In that month about 30% of wildlife watchers report a Saunders's Tern in Mumbai on a given day, against under 5% in September to June, the lowest months. That is one of Mumbai's wettest months, with about 830 mm of rain against almost none in January.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Saunders's Tern sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 cities where we can rate Saunders's Tern sightings, Mumbai has the highest daily chance: under 5%. Next come Abu Dhabi (United Arab Emirates, under 5%) and Kozhikode (India, under 5%).
GBIF citizen-science records
It is estimated from how often the Saunders's Tern is recorded against all the birds logged in Mumbai (272 verified sightings), 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.
