Toads chirp when they're scared. I know, because this evening at dusk I helped to carry about 100 of them across a road in buckets.
No, I'm not an Eco-Warrier. I just got talked into doing it by my mum, who has both Eco and Warrier tendencies at times (when she's not sat watching a BBC drama with her feet up on the poof).
Apparently, at this time of year, the green warty ones wake up en-masse from their forest hibernation and feel the watery call of the pond on the other side of a very busy road, where they must go and reproduce. There is a huge risk of them getting squished by cars mid-hop. So some keen toad-protectors put up a plastic barrier along the edge of the road and then recruit an army of toad well-wishers in wellies, brandishing torches and buckets, who are willing to scoop them up and carry them safely across to the other side.
As I stood there in the dark, amongst cowpats, shining my clever iphone 'flashlight' app over my nephew as he enthusiastically unloaded the chirping 'mating pairs' bucket near the pond, I must confess I felt a small pang of longing to be in a warm pub, without wellies on, drinking a large glass of red.