For the second year in succession, the kingfishers have lost a nest to predation by mink. The kingfishers had been incubating for about 2 weeks when the mink struck, predating the Sand Martin nest and the Kingfisher nest within a matter of minutes.
The only piece of positive news in this is that the adult female, who was incubating at the time managed to exit the nest before the mink entered, so both of the adults have survived the attack and still have time for another brood.
What this incident has highlighted though is how vulnerable these nest banks are to Mink. During the time I’ve been observing this nest site, I had assumed that the entrance was safe from the Mink, being over 4ft above the base of the bank and dug into a loose sandy clay bank. Although the Mink struggled to enter the Kingfisher nest, it managed to get in after only a few failed attempts, and entered the Sand Martin burrow on its first attempt. Coming a week after many of us watched a Mink predating a Kingfisher nest on the BBC during Springwatch, I think this goes to show how much of a threat these introduced predators are to bank nesting birds like kingfishers and martins.
Half an hour after this event, the male was removing egg shells from the nest burrow.
I very nearly left my hide to try and scare the mink off while this was unfolding, however, I’m certain the Mink would have returned after I left and so I decided to document what happened without interfering, however I will now be discussing mink trapping with the land owner