Is it really summer?

.
11:00 - spotted at Strickley - one swallow.

Looking rather sorry for itself and probably wondering where it's mates are, and why it made the effort to get here so early in the year.

Never have we seen one so early, and never has winter gone on so long.

Perhaps - "Summer is icumen in". If you click on the link you can read all about it. I especially like the modern version -

Summer has come in,
Loudly sing, Cuckoo!
The seed grows and the meadow
blooms
And the wood springs anew,
Sing, Cuckoo!
The ewe bleats after the lamb
The cow lows after the calf.
The bullock stirs, the stag farts,
Merrily sing, Cuckoo!
Cuckoo, cuckoo, well you sing,
cuckoo;
Don't you ever stop now,

Sing cuckoo now. Sing, Cuckoo.
Sing Cuckoo. Sing cuckoo now!