The Mistle Thrush (Turdus viscivorus) is a bird common to much of Europe, Asia and North Africa. It is a year-round resident in much of its range, but northern and eastern populations migrate south for the winter, often in small flocks. It is a large thrush with pale grey-brown upperparts, a greyish-white chin and throat, and black spots on its pale yellow and off-white underparts. The sexes are similar in plumage, and its three subspecies show only minimal differences. The male has a loud, far-carrying song which is delivered even in wet and windy weather, earning the bird the old name of "stormcock".

Found in open woods, parks, hedges and cultivated land, the Mistle Thrush feeds on a wide variety of invertebrates, seeds and berries. It’s preferred fruits including those of the mistletoe, holly and yew. Mistletoe is favoured where it is available, and this is reflected in the thrush's English and scientific names; the plant, a parasitic species, benefits from its seeds being excreted by the thrush onto branches where they can germinate. In winter, a Mistle Thrush will vigorously defend mistletoe clumps or a holly tree as a food reserve for when times are hard.

The Mistle Thrush is the largest thrush native to Europe. The nominate subspecies measures 27–28 cm (10.6–11 in) in length, with a 45 cm (18 in) wingspan. It weighs 93 to 167 g (3.3 to 5.9 oz), with an average of around 130 g (4.6 oz). It has a stocky upright posture when on the ground. It has pale grey-brown upperparts, the chin and throat are greyish-white, and the yellowish-buff breast and off-white belly are marked with round black spots. The spotting becomes denser on the lower chest, giving the appearance of a breast-band. The long tail has white tips on the outer feathers, and the underwing coverts are white. The eyes are dark brown and the bill is blackish with a yellowish base to the lower mandible. The legs and feet are yellowish-brown. There are no plumage differences between the sexes. Juveniles are similar to adults, but they have paler upperparts with creamy centres to many of the feathers and smaller spots on the yellowish underparts. By their first winter they are very similar to adults, but the underparts are usually more buff-toned.