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Solomon Islands: Lake Tegano and a Vangunu camera study

Lake Tegano lies in the footprint of Rennell’s former atoll lagoon. A Vangunu camera survey in 2020–21 recorded 95 images of Uromys vika, from which its authors inferred up to four animals.

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A white-sand beach shaded by leaning coconut palms and dense green trees on the left, calm clear shallow water on the right, a small jetty with boats in the distance and a bright sky with scattered clouds
Beach at Marovo Lagoon in the Solomon Islands, photographed 16 August 2008.Photograph: Xplore Dive

At a glance

Vangunu camera survey (September 2020–August 2021)
95 images of Uromys vika; authors inferred up to four individuals[2]
Rennell’s landform
Rennell is a raised coral atoll.[1]
Bat species listed for East Rennell
11, one of them endemic[1]

A place worth remembering

Lake Tegano in Rennell’s atoll landscape

East Rennell covers the southern part of Rennell Island. Lake Tegano occupies the basin where the coral atoll’s lagoon once lay; limestone islets dot the water, while forest covers the adjoining karst.[1]

Vangunu: what the camera survey recorded

A paper published in 2023 reports on nine camera traps used in the Zaira area of Vangunu between September 2020 and August 2021. Uromys vika appeared at two sites about 2 km apart; the 95 images led the authors to infer up to four individuals.[2]

What UNESCO counts at East Rennell

UNESCO’s East Rennell page lists 11 bat species, one of them endemic, and 43 breeding land and water birds. It also gives 27 land-snail species, seven of them endemic, and says the lake’s brackish waters hold an endemic sea snake. Rats and alien land snails, it adds, are absent from the property.[1]

Good to know

A few clear answers before you explore.

How does Lake Tegano relate to Rennell’s atoll?

It occupies the basin where the coral atoll’s lagoon once lay. UNESCO places the lake within East Rennell, in the south of Rennell Island.[1]

Do 95 camera images mean 95 giant rats?

No. The 2020–21 study recorded Uromys vika at two sites about 2 km apart; its authors inferred up to four individuals from the images.[2]

What does UNESCO say lives in Lake Tegano?

UNESCO says the lake’s brackish waters hold an endemic sea snake, and that over 300 diatom and algae species make up most of its flora, some of them endemic.[1]

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