what do swans eat and drink
Like that Hamsa separates the good things from the bad things, Water birds separate good water from the bad water. It has got a sieve like structure (lamellae) in its mouth which separates water from mud. Probably this is what lead to the belief that Swans can separate milk from water and drink only milk.
Swans will not over-eat, but they can become dependent on a few repeat sources of the same food. Carina Norris, a nutritionist, said: It seems swans have a diet high in vitamins from tadpoles and insects and these same vitamins won't be present in white bread in the same quantity. Anything with seeds in, such as wholemeal bread, would be better..