The European green woodpecker, Picus viridis (noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "yaffle" in a sentence
"If a corpse be kept over a Sunday another death will occur before the week is out; should a big bumble-bee enter the window, a guest may be expected; and when the woodpecker, commonly called the yaffle, laughs, they say the rain is coming."
"I might start using it in my ESL classes so that a new generation of Koreans will know the proper English terminology for an 'armful of something' is a 'yaffle'."
"Behind the hill, behind the trees, the green woodpecker – the yaffle – shouts his mocking, laugh-like call which in country weather lore is a sure sign of rain."