We estimated Israeli and Polish citizens' change in the willingness to pay (WTP) to protect the habitat of a trans-border migratory species, the white stork, due to new information presented to them. This was done by Contingent Valuation study. Few contingent valuation surveys have studied whether households in one country would consider information on how citizens in another country would invest in the same project. The current study addresses that gap. In our study, we randomized split samples with and without information on cooperation. Despite significant WTP for that species, the results regarding the role of information were mixed. While in Israel that information increased WTP, in Poland it did not significantly increase (or decrease) WTP. We found also age as a significant explaining variable, so that might affect people's behavior toward information they acquire.