Common Mallard

Thanks Emma,for the good ideas and for all information you gave me,in next months i have to go to Porto almost every days,so i'am going to have oportunity to contact all the people who can make the diference,i'll keep you informed of the process,thanks again

The fishing industry can co operate and give fish scraps for feeding the water birds. ALso ,this park has emotional value too. i tis important for the well being of all. There fore you can ask them to add nutrients to the pond and maintain the pond too.
Then you can put up signs of No Feeding . in a way now these have become domesticated. Good Luck!!

Thanks Emma,this place is the porto city park big pond,there are open fields ,ancient farms and fish industry facilitis,in the direction of the green fields you see,i'am not certain of the figure but it's several hectars(maybee ten or more)whith forest,bush and open fields and two ponds the big that is in the photo and a litle where i spotted a mute swan in december.this group,as european herring gulls(juvenil most but adults also)Mute Swams,common mallars,Rock piegeons,Black Headed Gulls,the hibride of common duck and Muscovy is not here but was spotted at the bush you see in the left side of the picture and there where there some house sparrows.Like you say another day when people feed the conflit emerge,i have more photos of thet and i'll post them later,it's amazing(from the bad side) the noise they make and they engage ,it's the worst feeding place that i see,i'am going to contact the FAPAS( bird association )to see if they are doing somethig about,to colaborate,i do not imaginate that this problem was so big

what a beautiful pic! The last pic is great .it has an assortment of waterfowl. There are open fields behind? What kinds of gulls and swan are they?