While long thought to have been aquatic or semiaquatic, hadrosaurids were not as well-suited for swimming as other dinosaurs (particularly theropods, who were once thought to have been unable to pursue hadrosaurids into water).
Iako se dugo smatralo da su bili vodene ili vodozemne životinje, hadrosauridi nisu bili tako dobro prilagođeni pilvanju kao drugi dinosauri (posebno teropodi, za koje se nekada smatralo da nisu mogli slijediti hadrosauride u vodu).