| Wagtails | |
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| White wagtail (Motacilla alba) in Stockholm, Sweden | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Motacillidae |
| Genus: | Motacilla Linnaeus, 1758 |
| Type species | |
| Motacilla alba Linnaeus, 1758
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| Species | |
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Many, see text | |
Wagtails are a group of passerine birds that form the genus Motacilla in the family Motacillidae. The common name and genus name are derived from their characteristic tail pumping behaviour. Together with the pipits and longclaws they form the family Motacillidae.
The forest wagtail belongs to the monotypic genus Dendronanthus which is closely related to Motacilla and sometimes included therein.
The willie wagtail (Rhipidura leucophrys) of Australia is not a true wagtail; it was named as such by early settlers from England from its superficial similarity in colour and behaviour to the pied wagtail, but belongs to an unrelated genus of birds known as fantails.