Humans aren't the only ones worried about the horrible little buggers known as ticks. It seems like at least one bird species safeguards its nests against ticks with a surprising piece of litter. Cigarette butts.
Birds are capable of extraordinary behavioural feats, from solving complex puzzles to tool making. There may be good reason for that. A new study shows that, pound for pound, birds pack more neurons into their small brains than mammals, including primates.