Two Mute Swan Families & Cygnets [May 2021]

In May 2021, I followed closely two mute swan couples in their breeding season. The first couple laid their eggs in late March. Three out of four eggs hatched in early May. Unfortunately, one cygnet disappeared in less than a week, and the other two disappeared together about a week later. I suspect that the heron family sharing the same pond, which apparently took interest in the cygnets (not captured in photos, though flyovers during the day were frequent), snatched them.