Friday the 13th

I’m stupidly superstitious, but fortunately, 13 doesn’t bother me.
I had to go into Aberdeen this afternoon and saw these oystercatchers on the beach. I saw one hopping about and I thought it must be injured but then I noticed the others were hopping too. Apparently it’s to conserve heat.
I also thought they were standing on stones, but it’s just their reflections.
Have a good weekend.