My elder brother told me that seagulls were only called seagulls if they were by the sea. If they were over land they were 'landgulls'. I believed him for years and actually managed to convince loads of people that it was true!
A childhood belief about birds

others believed things like this
- I used to think seagulls were called seagles. Like a portmanteau of 'sea' and 'eagle'.
Anon - When I was little I thought seagulls were called seagles. Like a portmanteau of 'sea' and 'eagle'.Anon
- When I was little I thought seagulls were called seagles. Like a portmanteau of 'sea' and 'eagle'.Anon
- My friend managed to convince a gulliable kid at various stages of school that he was superman and a robot.— naff
- i used to believe that if you ate loads and loads of crust from bread it would make you have BIG boobies.— Israel Bliss
- I used to wonder when reading the obituary column how people always managed to die in alphabetical order.— diane