Seagulls are declining in birdwatching surveys — have we hit 'peak gull' or are they hiding in plain sight?

Gulls are intelligent birds that have learned to benefit from humans. (ABC Gold Coast: Mark Rigby)

They're the scourge of the skies when you're enjoying a bite by the beach but seagulls may have reached their peak in Australia, according to the country's largest citizen science project.

Birdlife Australia data shows reports of silver gulls are decreasing across the country.