Noog poob, plaub, fluttering thiab flapping - pigeons, crows thiab lwm yam noog tuaj yeem yog cov kab tsuag tiag tiag yog tias lawv tau txiav txim siab siv canopies, sam thiaj railings, carports lossis windowsills raws li lawv qhov chaw. Lawv tuaj yeem nqa cov kab mob thiab cov kab mob.