The conservation charity, WWF, has recorded images of 12 rare Sumatran tigers, including a mother playing with cubs, in an Indonesian forest.
The area is reportedly due to be cleared by loggers - a process which the WWF says must be stopped.
WWF captured the images with concealed cameras in the Bukit Tigapuluh forest and is trying to determine the reasons for the rich showing of tigers.
There are around 400 Sumatran tigers left in the wild.
The video was recorded in March and April.
What's unclear is whether we found so many tigers because we're getting better at locating our cameras or because the tiger's habitat is shrinking so rapidly here that they are being forced into sharing smaller and smaller bits of forests, said Karmila Parakkasi, leader of WWF's tiger research team in Sumatra.
That was the highest number of tigers and tiger images obtained... we've ever experienced, the researcher added.
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