A flash of blue

It's a very hot, very sunny, perfectly lovely late summer's day and I am mostly stuck indoors working from home.
I took my break in the park and spotted a flash of blue from the corner of eye. It disappeared into a weeping willow tree. 
I went looking and found this nuthatch. I love nuthatches. I love how they scamper headfirst down tree trunks and along branches. 
I'm back indoors again now. I've opened all the windows. It's baking. 
Maybe this is the last hurrah of summertime so I'm making the most of it.