Methyl anthranilate formulations repel gulls and mallards from water.

Belant, J.L., S.W. Gabrey, R.A. Dolbeer, and T.W. Seamans. 1995. Methyl  anthranilate formulations repel gulls and mallards from water.  Crop Protection 14:171-175.  

Belant_et_al_1995.pdf