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Mammals
© WWF-Hong Kong

Of the 13 species of otters in the world, Hong Kong is home to one: the Eurasian otter (Lutra lutra). Eurasian otters are mainly nocturnal, but their mysterious night-time activities make it difficult to find and track them, so scientists – and the general public as well – don’t know much about them. What we do know is that rampant development and other human activities in wetlands are threatening the lives and habitats of these special creatures.   

The Wetland Incubator project has gathered experts and groups of citizen scientists who are scientifically minded detectives. They will observe and record otter signs like spraint and footprints that will allow us to better understand their distribution and population status. Design teams with inventive minds and nature-loving hearts are also recruited to help raise public awareness of otters by developing various information campaigns.   

Programmes:

Joint Study on Hong Kong Otter Ecology

Otter Citizen Scientists

 Otter Citizen Scientists
© WWF-Hong Kong
   

Thanks to the help, support and dedication from our Wetland Incubator citizen scientists for the past 3 years, we have completed the monitoring, camera traps maintenance and data analysis successfully. Through the deployment of camera traps, rare and precious footages were captured which allow us to gained a greater understanding of our local Eurasian otter behaviour, and it is also especially important for the on-going study of mammal distribution within Mai Po Nature Reserve. 

Some of our citizen scientists have been with us for all three years, with some even becoming group leaders, transferring their knowledge and experience to new joiners. We look forward to seeing some exciting monitoring results – together we can help drive Hong Kong otters research forward!

Otter Education Design Team

 Otter Education Design Team
© WWF-Hong Kong

 

This design team was formed in November 2021. After a field trip to Mai Po and a wide-range of workshops, the team quickly began to brainstorm and plan a series of otter educational activities to raise public awareness on this elusive species. Riding on World Otter Day in May, the team designed and ran the “Little Otter Painters | Colouring Competition” and held the “Oh My Otter” festival with an exhibition, workshops and local arts and crafts market in 2022.

The educational materials produced by the team were reused in the 2023 "Where’s Otter? -- Come join World Otter Day” Exhibition at the Central Market, which engaged over 6,000 guests about the local otter species. Furthermore, the beautifully hand-crafted otter sculptures have also been on display at Mai Po Peter Scott Visitor Centre. 

 

 

Spraint Detection Conservation Dog

Spraint Detection Conservation Dog
© WWF-Hong Kong
   

Detection dogs have successfully assisted in spraint surveys around the world. The Wetland Incubator project recognised the potential of including dogs to detect spraints in Hong Kong and began to explore the feasibility and effectiveness of this method.

The team invited a Border Mongrel to participate in our pilot research. The dog will go through different training stages and assessments, including environmental desensitisation and odour detection training – conducted off-site at first, then at the Reserve. This will be the first pilot project to use a detection dog for conservation purposes in Hong Kong. 

Trainer Garay and the conservation dog Aljo have begun conducting indoor and outdoor training at Mai Po Nature Reserve from 2022-2024. We are excited to share that the pilot research has been successfully completed and Aljo was able to distinguish and locate hidden spraint samples within a set boundary.

Otter Spraint Platform

Otter Spraint Platform
© Lok Sin Tong Wong Chung Ming Secondary School
   

Observing and collecting otter spraints is an excellent way to understand their distribution and identify individuals. Given the knowledge that otters mark their territory by placing spraints on prominent features, the project initiated a cooperative programme with Lok Sin Tong Wong Chung Ming Secondary School to design man-made platforms that will act as accessible prominent features for the otters. The platforms will also be equipped with an infrared camera to record the behaviour of otters that use them. The programme allows the students to utilise design thinking to create a platform that can withstand changes in water levels – a more holistic approach to finding and collecting spraints.

By June 2022, students had completed a series of field trips and otter workshops. After the designing and building process, their work is finally completed and deployed in the reserve. Field tests has begun to ascertain the effectiveness of the platform.

Eurasian Otter Awareness Campaign and Storybook Production

Eurasian Otter Awareness Campaign and Storybook Production
   

As the Eurasian otter is not widely recognised among Hong Kong citizens, most mispronounce "otter" in Cantonese. If a storybook and campaign about the Eurasian otter could be designed, highlighting its body features, habits, and the threats it faces in the form of a story, it is believed that it would generate more interest among the public and help them become familiar with this mysterious species.

Therefore, we have invited students from the School of Design at the Hong Kong Polytechnic University to use their creativity to bring this idea to life. This task is not easy, as it requires finding a balance between portraying the otter's fascinating personality and maintaining accuracy in depicting its physical features and the environment.

In total two storybooks and otter campaigns were developed by the students. They have created some incredible work (especially ‘The Mysterious Creature of Mai Po’ storybook) which we have produced to continue raising public awareness on Eurasian otter in Hong Kong. 

Artificial Otter Holt Design Challenge

Artificial Otter Holt Design Challenge
   

Deep Bay wetlands serve as an important habitat for the Eurasian otter. Yet, it remains a mystery on where the local otters rest, sleep and reproduce, as otter holt has never been found in Hong Kong. Given the threats and challenges faced by the local otter population, it is crucial to make effort to enhance their habitat and expand our research on otters in Mai Po Nature Reserve, which could potentially be the last refuge for the species. One widely adopted method to achieve this is by building artificial otter holts. 

We hope by incubating an otter holt that is suitable for Hong Kong local otter preference and environment, the potential solution can then be replicated to other Deep Bay wetlands. We have arranged discovery workshop to provide interested individuals with more knowledge on local Eurasian otters and what the challenge entails. In total we have carefully selected 7 teams (designs) to join our field visit, workshops and final showcase. Two designs were then chosen, built and deployed on site with the support from our collaborator, MUDWORK Studio. Recycled Acacia wood from Highways Department 'SUCCEED•SUSTAIN SLOPESCAPE: Enhancement Programme of Vegetated Slopes’ and Post Tree Lifestyle were used for the holts. So far we have observed species including mongoose, snake, mouse using the holts.