There were a few Lycaenids flying around the path. Sorry for poor shot, it was getting late. Is this Black-eyed Blue? I'd not seen it before:
Back by the car I was surprised to see an early male Aetherie Fritillary, already with a piece out of its hindwing.
The hills north of Silves are a reliable area for Provencal Frit - they were seen in several different sites:
.
Spanish Marbled White was also fairly common, but difficult to approach:
I saw one Monarch swooping around a garage forecourt, but it didn't stop

A lovely, quiet area with few cars, especially this early in the season.
Tony M.