Black-fronted Tern

Black-fronted Tern

Chlidonias albostriatus

Silhouette: Andy Wilson · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Daily sighting probability ~30% · Possible
at Fiordland National Park
774 Verified sightings at Fiordland National Park From 2019 to 2026
1,358 Verified sightings across all 5 parks From 2019 to 2026
October Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Black-fronted Tern

The black-fronted tern (Chlidonias albostriatus), sea martin, ploughboy, or tarapiroe (Māori), is a medium-small tern endemic to New Zealand. Black-fronted terns can be found in coastal habitats from the southern tip of the North Island to the eastern South Island as well as Stewart Island. Their breeding range is restricted to the South Island, where they will form breeding colonies on braided river islands.

The species is globally and nationally endangered, due to its small and declining national population. Black-fronted terns are vulnerable to a range of threats, including predation by introduced mammals, habitat loss (land use changes and weed encroachment), resource abstraction (gravel and water), human disturbance, and climate change.

German naturalist Johann Reinhold Forster described the black-fronted tern from a specimen collected at Queen Charlotte Sound, Marlborough in 1832, giving it the binomial name Sterna antarctica, which had already been used for the Antarctic tern by French naturalist René Lesson the previous year.

The first valid description of the species was by George Robert Gray in 1845, when it was described as Hydrochelidon albostriata. Its specific... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Aoraki Mount Cook National Park 🇳🇿 New Zealand
~50%
2 Fiordland National Park 🇳🇿 New Zealand
~30%
3 Arthur's Pass National Park 🇳🇿 New Zealand
~20%
4 Rakiura National Park 🇳🇿 New Zealand
~10%
5 Abel Tasman National Park 🇳🇿 New Zealand
<5%

Quick answers

What are the chances of seeing a Black-fronted Tern in Fiordland National Park?

About 30% of wildlife watchers report a Black-fronted Tern sighting in Fiordland National Park, based on 774 verified sightings from GBIF citizen-science data.

When is the best time to see Black-fronted Tern in Fiordland National Park?

October has the highest sighting rate for Black-fronted Tern in Fiordland National Park in our monthly data.

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