Interested readers - I'm not saying transport of fish or eggs is impossible by birds. Exceptions occur in many, many instances, never say never when dealing with nature. If bird transport occurs it is a relatively rare occurrance compared to human transport, the most common method of moving fish.
If I received a dollar for every water body that was contaminated with fish from human methods and had to give up $1 for every successful contaminated stocking from bird transport, I am betting I would have lots of extra money to spend for fish food
.