Counting cormorants

Bregnballe, T., Carss, D., Lorentsen, S.-H., Newson, S., Paquet, J. Y., Parz-Gollner, R., Volponi, S. 2014. Counting cormorants. In Carss, D., Parz-Gollner, R. & Trauttmansdorff, J. The INTERCAFE Field Manual. Research methods for cormorants, fishes, and the interactions between them. NERC Centre for Ecology & Hydrology, Chapter 3: 14-34.