Yurikamome / Black-headed Gulls (winter pelage) had cached the sounds of a plastic bag that yummy scones in it. Silently they came across behind me, just gazing the plastic bag. so I crushed one scone and served to them.
Soon many of Black-headed Gulls fly in and quickly pecked it and flew away.
Black-headed Gulls knows how to get what they wants. Guess what they asked someone to serve them something to peck around that pond today?