I’m familiar with the humble green tennis ball, my boy Nemo was the biggest fan of course. I thought I saw one tumbling over the shingle one morning, until I brought out my binoculars and discovered it was in fact a bird!
I still can’t believe we have such interesting birds in the UK. The more you learn about nature, the more you worry for it, and as for these little guys they are on the red list in the UK. I wrote about this glowing migrant on my Nemo by Sea blog, where you can also see the very photo I took of this bird on the pebbles, in all its tennis ball glory.