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The pipits are a cosmopolitan genus, Anthus, of small passerine with medium to long tails. Along with the and , the pipits make up the family Motacillidae. The genus is widespread, occurring across most of the world, except the driest deserts, rainforest and the mainland of Antarctica.
They are slender, often drab, ground-feeding insectivores of open country. Like their relatives in the family, the pipits are monogamous and territorial. Pipits are ground nesters, laying up to six speckled eggs.
Molecular studies of the pipits suggested that the genus arose in East Asia around seven million years ago (Mya), during the Miocene, and that the genus had spread to the Americas, Africa, and Europe between 5 and 6 Mya. Speciation rates were high during the Pliocene (5.3 to 2.6 Mya ), but slowed down during the Pleistocene. Repeated dispersal between continents seems to have been important in generating new species in Eurasia, Africa, and North America, rather than species arising by radiation once a continent was reached. In South America, however, vicariance appears to have played an important role in speciation.
The family has an additional species, the golden pipit, Tmetothylacus tennelus, which belongs to a distinct, monotypic genus. This species is apparently intermediate in appearance between the pipits and the longclaws, and is probably more closely related to the longclaws. One species, the yellow-breasted pipit, is sometimes split out into a genus Hemimacronyx, which is considered to be intermediate between the longclaws and pipits. The split was originally proposed based on morphological features, but it has also found support based upon genetic analysis.
The plumage of the pipits is generally drab and brown, buff, or faded white. The undersides are usually darker than the top, and a variable amount of barring and streaking is seen on the back, wings, and breast. The drab, mottled-brown colours provide some camouflage against the soil and stones on which they are generally found. A few species have slightly more colourful breeding plumages; for example, the rosy pipit has greenish edges on the wing feathers. The yellow-breasted pipit, if it is retained in this genus, is quite atypical in having bright yellow plumage on the throat, breast, and belly.
Pipits are morphologically similar to some , but the two groups are quite distantly related; the lark family Alaudidae is part of the superfamily Sylvioidea, rather than the Passeroidea, where the pipits are placed. Morphological differences between the two groups of birds are, in fact, plentiful. Anatomical differences include a differently structured syrinx, differences in the structure of the tarsometatarsus, and in many lark genera, the presence of a distinct 10th primary feather, a fourth tertial feather, and feathers at least partially covering the nostrils.Alström, Per, Krister Mild and Bill Zetterström (2003) Pipits and Wagtails of Europe, Asia and North America Helm Identification Guides Bill shape differs between larks and pipits, with larks having an evenly sloping culmen, whereas most pipits have a small hump over the nostrils, and lark bills are generally heavier, reflecting differences in diet. Differences occur in the feather tracts of the two groups; while many larks have crests, no pipit does; pipits have only one prominent row of , whereas larks have two.
As might be expected from a genus with such a wide distribution, the pipits are found in an equally wide range of habitats. They occur in most types of open habitat, although they are absent from the very driest deserts. They are mostly associated with some kind of grassland, from sea-level to alpine tundra. The rock pipit and South Georgia pipit are found in the rocks and cliffs of the seashore, whereas several species are restricted (for part of the year in some cases) to alpine areas. The family also ranges from the northern tundra and the subantarctic islands of New Zealand and the South Georgia group to the tropics. They are absent from tropical rainforest, but a few species are associated with open woodland, for example the wood pipit of southern Africa, which is found in open woodland savanna and miombo woodland.
The pipits range from entirely sedentary to entirely bird migration. Insular species such as Berthelot's pipit, which is endemic to Madeira and the Canary Islands, are entirely sedentary, as are some species in warmer areas like the Nilgiri pipit. Other species are partly nomadic during the nonbreeding season, like the long-legged pipit of central Africa or the ochre-breasted pipit of South America. These seasonal movements are in response to conditions in the environment, and are poorly understood and unpredictable. Longer, more regular migrations between discrete breeding and wintering grounds are undertaken by several species. The tree pipit, which breeds in Europe and northern Asia, winters in Asia and sub-Saharan Africa, a pattern of long-distance migration shared with other northerly species. Species may also be partly migratory, with northern populations being migratory but more temperate populations being resident (such as the meadow pipit in Europe). The distances involved do not have to be that long; the mountain pipit of southern Africa breeds in the Drakensberg of South Africa and migrates north only as far as Angola and Zambia. Migration is usually undertaken in groups and may happen both during the day and at night. Some variation happens in this, for example, Sprague's pipit of North America apparently only migrates by day.
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