The Snowy Owl has reappeared on Holyhead Mountain since the 11 April and apparently seen again yesterday (16th).
Also yesterday a good candidate for Iberian Chiffchaff was found singing in a woodland clearing in Gwydir above Penmachno at GR: SH773519 where the mountain bike trail leaves the forest track to the south. The bird still present on 17th and easily picked up on song. If you go approach and leave via Penmachno as the road to the north is in a bad state and there's lots of gates to open an close.
The Ring-necked Duck also remains on Llyn Bran near Llyn Brenig.