On the tiles

Cattle egrets, aka garceta bueyera, aka ardea ibis, have been expanding their territory, like an avian Trump but not so orange, in recent years, and they now occur in flocks in Asturias. I´d not seen them in Santolaya before but yesterday they colonised a huge eucalyptus in the village and I got the photo. I was going to call it "up a gum tree". It´s in extra. But now they´ve taken over the roof of Carmen´s house, and I watched them do it, and here´s the evidence. 
The bird furthest left and the bird low right, in the main photo, are obviously young ones.