People are being asked to join the "puffarazzi" and photograph puffins with fish in their bills to help find out what the seabirds are feeding their young.
The citizen science scheme was first run by the RSPB in 2017, with 602 people sending in 1402 photos of the seabirds from almost 40 colonies.
The RSPB says the pictures have helped scientists identify areas where puffins are struggling to find the large nutritious fish which they need to feed their chicks, or pufflings.
34,000 puffins are known to breed in Wales at the last count in 2017-25,000 of these found on Skomer Island, off Pembrokeshire. They are also found at Skokholm, Bardsey Island, Puffin Island and RSPB South Stack.
The RSPB said action was needed to make sure the bird continues to have a future in Wales.
As climate change and human activities continue to impact upon the marine ecosystem and associated food chains, we need to act now to make sure puffins have a bright future in Wales. This year Welsh Government have opportunities to enhance protections if they choose to include puffins and other seabirds in their plans to designate Marine Conservation Zone protections and if they look to include research to better understand prey species in their marine evidence strategy. These measures should be part of a wider plan to protect seabirds and as such are calling on Welsh Government to develop a Seabird Conservation Strategy. >