Sorry as this is likely the wrong duck community (i mean the focus of cute instead general) but its by far the largest: what does the white coloring mean? We get more ducks as years pass that look like they got too close to wall painters

Source: https://commons.m.wikimedia.org/wiki/File:6duck_(44503260).jpeg

Source: https://commons.wikimedia.org/wiki/File:Dommusc01.jpg

I've come home to my ducks being free in the yard 3 times this week. Every time I patch a hole, another one is made. My ducks are well trained so I was able to get them in easily. The two most notorious escapees led the others back in when I opened their gate