Our small pond has number of frogs (and newts) in it, finding a bit of welcome wetness in a garden that is increasingly resembling the African Savannah.
They are moor frogs, Rana arvalis, and though they are common across central Europe, I have never seen them before in the UK.
What is curious is that in sunlight (and unfortunately not showing up too well on my photos) the males have a definite blue tinge. During the mating season they actually turn sky blue! (see this photo here by Blaž Šegula if you don't believe me).
Anyway, the cats are deeply fascinated by them, and Simbi, especially, spends hours at a time sitting in the long grass around the pond edge, waiting for a chance to pounce on his new toy!