欧亚鸲（学名：Erithacus rubecula），俗称知更鸟，是一种细小的雀形目鸟类，曾被界定为鸫亚科，现归类为鹟科。 欧洲很常见，由西伯利亚至阿尔及利亚，远至大西洋的亚述尔群岛和马德拉，以及东南面的高加索山脉，也有其踪迹。

牠是欧洲常见的鸣禽，身长12.5–14.0厘米（5.0–5.5英寸），性好战，因胸前鲜艳的羽毛最初被称作redbreast（红色胸脯）。15世纪欧洲时兴以人名称呼常见动物，时人称它为Robin redbreast，后来简略为robin（Lack，1953：44）。

叫声啭鸣似笛，在繁殖季节由早至傍晚鸣叫，甚至夜晚，所以有人将牠与夜莺混淆。冬季时雌鸟会另觅地方以便喂养小鸟，雄鸟则留守旧巢，全年居于同一地点。爱在缝隙、小洞甚至人造物料如弃置水壶筑巢。小欧亚鸲羽毛颜色并不显著，在从巢中飞出来的2至3个月后，红色的羽毛开始在下巴长出，再过2至3个月，鲜艳的羽毛特征渐渐形成。

The European robin (Erithacus rubecula), most commonly known in Anglophone Europe simply as the robin, is a small insectivorous passerine bird, specifically a chat, that was formerly classed as a member of the thrush family (Turdidae), but is now considered to be an Old World flycatcher. Around 12.5–14.0 cm (5.0–5.5 in) in length, the male and female are similar in colouration, with an orange breast and face lined with grey, brown upperparts and a whitish belly. It is found across Europe, east to Western Siberia and south to North Africa; it is sedentary in most of its range except the far north.