Toads breeding and a Brimstone Butterfly

This afternoon we had a walk round, checking a few birds' nests, and we saw a male Brimstone Butterfly flying over the Sphagnum Bog. The female apparently can be mistaken for a Large White, but this was a strong yellow, so I assume it was a male.

Ten Chiff-chaffs singing round Brookfoot and Tag Loops, and a singing Blackcap near Brookfoot Lock, my first Blackcap of the year. I know someone heard one already.

When we were on Tag Loop, near the pylon, I thought I heard toads chirping, and when we went up to the fence, we could see a colony of them breeding in the old lock. Spawn was visible among the water-plants now and again. I didn't know there was a breeding spot here. Does anyone know where Shelagh's mating pair would be heading. (Previous post.)

A pair of Long-tailed Tits were pecking lichen from the willows to cover their nest with a cloak of   invisibility (well almost.)