https://www.youtube.com/watch?v=uBuPiC3ArL8
At a previous work location there was this large back patio that faced a large pond. It was stocked with fish and attracted a wide variety of wading birds - great blue herons
(merely think something negative and off they flew), black- and yellow-crowned night herons, green herons, and great egrets. The latter were almost fearless and thus amenable to
being fed by the human interlopers. As soon as someone threw bread - or anything else that attracted fish - onto the water they'd fly right on over. There's something a bit unsettling about a bird with an eight foot wingspan making a beeline for you at eye level.
On a few occasions I took some expired bread to work and
fed the egrets. Before the fish started swarming the consternation would start. 1, 2, and occasionally 3 egrets fly over to the flotsam field. Uninitiated bystanders wonder what's going on - wonder why otherwise evasive wading birds are so interested, perhaps ask why I'm trying to feed wading birds some bread. Then
accelerated natural selection starts happening. Bystanders have generally polarized reactions to this: some are amused by the birds' ability to seize an opportunity, others repulsed at the thought of fish being lured to their demise.