Thank you, I will go to that BYC section and look. I do like the game cam idea and has crossed my mind. We have lots of animals here that would take advantage of an easy meal, initially I thought it was a Raccoon with nifty fingers! Ravens are everywhere here, Crows, Mink(nasty lil things), Black Bear, no Skunks on the island (yet), Cougars, Wolves..Eagles, I am sure I have missed a few others..Grizzly are starting to show up now, swimming over from the mainland ~ about four or more sightings in the past 3 - 5 yrs...likely have possums as well, some are on nearby islands around us.
For now, I have locked my Momma duck in the pen with her clutch, food and water..to keep safe. Hopefully, we can figure out whom has been sneaking around..
A little note about Ravens and Crows. Just in case anyone feels the need to shoot one~~Don't! As it becomes a family affair when one of their kind has been killed, they will have their wrath on your property forever. I know of someone who did this once..His fruit trees get stripped clean ever since by Crows and Ravens, meanwhile his neighbor has roughly the same fruit trees and literally right next door, are left completely alone..and heard just yesterday that Ravens have been seen taking baby duckies/chicks as well

They are scavengers but shocking to hear that they would also take live..gees, even Turkey vultures wait until the Ravens are done with something..as annoying as they are or can be, I don't think I would want to send an open invitation to raid my yard..