A ''Niché'' is the purpose of an organism(s).
Here is a food chain example: Millet Seeds -> Mice -> Owl.
The own would essentially be maintaining the population of the mice by eating it.
"Owl" and "turbit" are both breeds of pigeons, so I'm guessing you're not referring to the nocturnal raptor "owl." Turbits are characterized by small, crested heads and ruffled breasts. Owls are characterized by small beaks. I suppose a pigeon could be bred to have both characteristics, but generally owls and turbits are separate breeds.
yes they do like the water