In the pink

Aaaargh! Three days' R&R with no walking and far too little activity have led to a stiff, painful back today. Still don't have much energy, but temperature seems to be more-or-less back to normal and feeling a little more human, so I joined MrM and Louie on their snail's-pace walk around the Common this afternoon.

Several trees with pink catkins on the Common. Alder or hazel, maybe?