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Preprint of the Species identity and behaviour of cave-dwelling tree hyraxes of the Kenya coast is available from Authorea. This article describes previously unknown populations of Dendrohyrax validus from coast of Kenya. Article has been submitted to Ecology and Evolution, under Nature Notes category.

Dendrohyrax validus female from Shimba Hills National Reserve

17.4.2022 Scientific Reports

Tree hyraxes by night, filmed in Taita Hills, video 5.12.2021


Large article cover + four pages in largest newspaper in Finland Helsingin Sanomat. This article was written by Petja Pelli and photographs by Mika Ranta. They managed to see dwarf galagos and tree hyraxes on the same night. On the cover was Benson with Fenix TK25 RED flashlight.

September 2021 fieldwork

September 2021 I spent in Taita Hills and also in Diani beach. We surveyed forests of Ngangao, Mbololo, Vuria and Yale for tree hyraxes and galagos. I also visited Diani beach forests to see Kenya coast dwarf galagos (Paragalago cocos) that inhabit coastal indigenous forests.

Kenya coast dwarf galago (Paragalago cocos) from Diani Beach, Mombasa in September 2021. Photo Hanna Rosti


Video Benson Lombo took one night of African wood owl



Article about Rüppell’s Vulture and White-Backed Vulture. I was lucky to run into hundreds of vultures feeding on cow that had been killed by lions. This article tells how these species can be identified and why they are Critically Endangered (CR).



Youtube video, where you can test if you recognize nocturnal mammals of Taita Hills

There are seven species in the four minute video. Answers are in the end.


Mwalua Wildlife Trust offers volunteer opportunities in Lumo, Taita Sanctuary and Tsavo area. Learn more how Mwalua Wildlife Trust was founded, how they work, including distributing water to the animals during dry season and now offering volunteer opportunities.


Tsavo West by Peter A Mwasi and Hanna Rosti. This video is made for anyone visiting Tsavo West or to be used in schools. Video shows main attractions of Tsavo West Chaima crater and Mzima springs, and most common animals to be seen in Tsavo West.


Video about tree hyraxes and other nocturnal animals of Taita Hills. These animals are literally in the verge of extinction, as they only have three square kilometres of their habitat left. Conservation of these species and their forest would also mitigate climate change, improve water security and protect thousands of species in the mountains and in the surrounding savannas.


New fieldwork period has began. I will be working in Taita until 12.2.2021. This time we are observing animals with thermal imaging camera. It allows us to see animals without disturbing them.

This is very rarely seen suni antilope female (Rosti 2021).


Taita tree hyrax is making international news.

14 News stories about singing Taita tree hyrax is out Altmetrics


Wildsolutions published page for our article, this article also has recorded calls, including some extra calls. Wildsolutions is Eastern Africa Primate Diversity and Conservation Program managed by primatologists and conservationists Yvonne de Yong and Thomas Butynski. Site stores recordings of vocal profiles of many nocturnal primates and tree hyraxes. This information is very valuable natural history data about populations that are under great danger because of loss of habitat and other human related reasons.


13.12.2020 Our article is out!

Rosti, H.; Pihlström, H.; Bearder, S.; Pellikka, P.; Rikkinen, J. Vocalization Analyses of Nocturnal Arboreal Mammals of the Taita Hills, Kenya. Diversity 202012, 473.


Kone Foundation granted Hanna Rosti 68 000 euros for research during years 2021 and 2022. We are very grateful for this trust. Grant was given for dwarf galago and tree hyrax research and conservation.

Categories:About, All posts, Dwarf galagos, Forests, Tree hyraxTags: , , , , , ,

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