The chiffchaff , which normally migrates to iberia and north africa rather than crossing the sahara , now regularly overwinters in britain , especially in the milder areas of the south and west .

通常迁徙到伊比利亚和北非而不穿越撒哈的棕柳莺，现在规律性的在英国，尤其是温暖的南部和西部过冬。