The Little Tern project in Baltray suffered a blow Tuesday night/Wednesday morning, with 44 eggs being predated.
Our main suspects are gulls. The electric fence was fully functional and there were no signs that it had been breached, plus the way we have the fencing sectioned and the areas where the eggs were taken from would eliminate ground predators as suspects.
The attack must have taken place very early morning, as when the early warden arrived at the beach the damage had already been done. Our volunteer effort cannot stretch to wardening overnight, which would seem to be the only way to elimate these threats, particularly these days when there are so few hours of darkness.
Wardening extended to midnight last night and commenced at 3.30am this morning as a one off to try and see if the predator returned. A fox was seen, but while this is a worry, we're confident that it wasn't the culprit. On the other hand, gull activity began at 4am, with gulls in groups of 4 or 5 making aggressive swoops into the enclosure from time to time. The wardens chased them off and there were no further casualties, but it will be a continuing worry for us if this activity begins at 4am every morning.
We still have 20 eggs and 6 chicks, which, if we can hold on to these, is still an excellent number for Baltray. All the signs yesterday were that the birds are preparing to re-lay, with plenty of courtship going on. Fingers crossed!