Last year, avian flu killed more than 6,000 birds on the Farne Islands. Guillemots and kittiwakes were impacted the most, with 3,542 and 818 killed by the virus respectively.
Numbers of puffins on the UK's remote Farne Islands may be down 12% in the last five years, the National Trust has warned as it takes its latest census of the seabirds.
