Experts say there are now 11,061 breeding pairs of Gannets in the breeding colony at Bempton Cliffs. This means a 40% increase since the last survey in 2009.
When the research first began in 1969, there were only 22 breeding pairs at the site.
The researchers also counted 798 non-breeding birds, which, when they are old enough to find mates, will add to the numbers.
More top news
Showers this evening, dying out overnight. Bright start Sunday but cloud slowly building and rain by evening
Residents in Calder Valley have finally been able to enjoy Christmas six months to the day after floods ravaged their town
The family of a Huddersfield man missing for eight years have spoken of their anguish that he could legally be declared dead within days.