Ok its not my bike (M nI want to tidy it up first ) but I found this mouse nest in my leg armour last night. I think its a sign I need to get out and ride more often .
As a by the way, i remember seeing a chap in the States who had the little sods get into his air box for their new home. He didn't realise until he found that he had issues firing up to start the bike. Investigation proved there was little air flow...