June and July see the peak of breeding activity for the puffins of Skomer, but puffins have recently joined the Red List of Birds of conservation Concern due to their declining numbers. This reflects wider changes in our marine ecosystems.
Puffins are highly susceptible to the impacts of climate change, such as sea temperature rise and changes in the distribution and abundance of their prey. Other threats include oil spills and being caught in gillnets and other fishing gear.
Formerly common in southern Britain, there are now few puffin colonies south of Scotland and those of Skokholm and Skomer are two of the most important. There are approximately 2,000 breeding pairs on Skokholm and 6,000 on Skomer.