The passerine family Motacillidae contains six genera of birds the Pipits (Anthus and Tmetothylacus), Wagtails (Motacilla and Dendronanthis) and Longclaws (Macronyx and Hemimacronyx). The Pipits and Wagtails have a world-wide distribution except for the islands of the pacific, but the Longclaws are restricted to Africa. The family is believed to be relatively modern with the oldest fossil records dating from the Miocene 6-7 million years ago.
All members of this family are relatively small to medium sized, but often very attractive, birds. Body length ranges from 12.7 cm to 22.2 cm (5 to 8.75 inches). All species fly well and many are strongly migratory, particularly those that breed in the northern hemisphere. (The distributions mentioned in the checklist are for the most part breeding distributions and do not cover over wintering distribution).
The Wagtails are generally the more colourful of the groups and are more associated with water, especially in the breeding season, although Yellow Wagtail, Moticilla flava, is also associated with herds of cattle where it can be seen running around the feet of the large herbivores feeding on the insects disturbed from the grass by the cattle in their grazing. Some species are also commonly associated with human habitations and villages and even breed inside buildings.
Identification of the species of Motacilla is easier than for Pipits, although they have markedly different summer and winter plumages. They are slim birds with 10 primaries albeit the 10th is minute) and their nostrils are not covered by feathers.
The Longclaws a are closely related to the pipits but are larger and more colourful. They also have elongated hind claws and in the Yellow-throated Longclaw, Macronyx croceus this tendency reaches its extreme with the hind claw being twice the length of the rest of the foot (5 cm or 2 inches in length).
The Pipits make up the largest portion of the family and are birds of the open grassy areas, often common in the alpine zone. They are all fairly similar in shape and colouration and identification without a good view is difficult. Far easier is identification by song as all species have unique calls and songs. The identification of Northern Hemisphere species has recently been made easier by the publication of a beautiful book on the group by Christopher Helm publications, see book reviews below.
Pipits are characterised by the presence of thin pointed bills, medium to long legs, plumages that are brown to buff with varying degrees of streaking. Most species have little or no seasonal variation, the exceptions being Water, Buff-bellied, Rosy and some Rock Pipits. Like the rest of the family they are slim birds with 10 primaries albeit the 10th is minute) and their nostrils are not covered by feathers.
All species are active lively birds that are a pleasure to watch, they have interesting courtship involving much chasing, particularly the White Wagtail, M. alba and a tendency to collect into small, and sometimes large, flocks outside of the breeding season.
Taxonomically the family is at times quite confusing with experts arguing about subspecies and their validity as species. This is particularly bad in the Long-billed Pipit, A. similis, with 16 or more subspecies, the Yellow Wagtail, M. flava, with 13 or more subspecies, Richard's Pipit, A. richardi with 12 or more subspecies and the White Wagtail, M. alba, with 8 subspecies. The number of world species is therefore somewhere between 65 and 75, for a list of species and their breeding distributions see the Checklist of Motacillidae.