The groups mentioned above include fewer than half of Costa Rica’s birds. All the others are passerines, with feet specialized to grasp and perch on tree branches. They tend to be small land birds, many are LBJs but some are very bright and conspicuous. Included among the passerines in Costa Rica are 16 species of woodcreepers, all looking and acting rather alike. They are slender brown birds, with longish beaks and stiff tails, most often seen moving up tree trunks probing under bark and in plants looking for insects. The antbirds (30 species), though a more variable group, are not seen often as they are inclined to skulk in the shade low down in the forest. Most males come in shades of black or brown with some white, while the females tend to be olive or brown. Their name comes from the habit that some of them have of following marching columns of ants eating the insects and other small prey that the ants flush out of hiding. Costa Rica’s 22 species of wren are all smallish (10-20 cm), mostly brown or reddish brown. Their most distinguishing feature is their tail – usually held stiffly upright. They are found in forests, thickets, grassland and marshes, usually hopping or flitting low down searching for insects. Many of Costa Rica’s 50 species of warblers are migrants from North America. They are small birds, commonly found flitting round gardens and plantations often in the company of other birds such as tanagers and honeycreepers. They can be quite brightly coloured, usually yellowish or greenish with varying amounts of black, grey and white and maybe patches of red orange or blue. They mostly forage for insects but also take some nectar and juice from fruits. The gnatcatchers, 11 species in Costa Rica, are small, predominantly grey birds that are very similar in habit to the warblers. Although common and frequently seen, the sparrows and grosbeaks of Costa Rica are mostly rather dull brown or grey little birds, not a group that most visitors would be particularly interested in searching out. Indeed, most people will be very familiar with one of them, the house sparrow (gorrión común, Passer domesticus), which arrived in Costa Rica in 1974 having spread from North America, where it was introduced by European settlers in the 1800s.
The thrushes, 11 species breeding in Costa Rica, also tend to be rather drab birds but you will almost certainly see and can easily recognize the sooty robin (mirlo negruzco, Turdus nigrescens), as it looks and acts much like the blackbird (Turdus merula) common across Europe. The male is black and the female dark brown and both have an orange beak, legs and eye-ring. One member of this quite diverse group, the black-faced solitaire (solitario carinegro, Myadestes melanops) is famed for its singing and consequently its numbers have declined as it is caught for the pet trade.
In another diverse group are the blackbirds and orioles, included with them are the caciques, cowbirds, grackles, meadowlarks and oropendolas. Around 20 species occur in Costa Rica, distributed through all elevations and most habitats including human settlements and agricultural areas. They vary in size (15-56 cm), colour, ecology and behaviour. Widely distributed and conspicuous in the country is the great-tailed grackle (clarinero, Quiscalus mexicanus); the male is a large black bird with a purple gloss to its foliage and a long black tail. Both sexes have yellow eyes and black bills. The male, reaching 43 cm, is quite a bit bigger than the brownish female (33 cm). They occur at low and middle elevations on both the Caribbean and Pacific slopes of the country, mostly in open habitats. The large groups they form outside the breeding season can cause damage to agricultural areas and their roosting sites. Much more spectacular to look at is Montezuma’s oropendola (oropéndola de Montezuma, Psarocolius montezuma), which has a large (50 cm) brown body, with a black head and chest, a yellow-edged tail, an orange tip to its large black bill and a blue patch under its eye. The oropendolas breed in colonies, weaving large bag-like nests, many of which hang from the branches of each tree. Montezuma’s oropendola is quite strange in that 3-10 males establish a colony in a single tree and then defend the 10-30 females that join them to mate and nest there. The dominant male tends to mate with most females, but there is much competition with aggressive displaying and fighting between the males. The bronzed cowbird (vaquero ojirrojo, Molothrus aeneus) does not bother to make any form of nest; instead, the female lays her eggs in the nest of another species and leaves the other bird to rear her young.
Jays, which are members of the crow family, are some of the largest passerines, reaching up to 71 cm in length. Most are brightly coloured, such as the white-throated magpie-jay (urraca copetona, Calocitta formosa), which is found in open wooded sites and around human settlements on the northern Pacific slope. This is a large bird, up to 46 cm, brilliant blue above and white below with a conspicuous crest and a long blue tail. In contrast, the slightly smaller (40 cm), more widely distributed brown jay (urraca parda, Cyanocorax morio) is, as you might guess, brown! It has a pale brown to white chest and belly and its tail is white-tipped. Jays are omnivorous, eating just about anything and everything. Their diet includes eggs, nestlings, carrion, insects, fruit and nuts, which are foraged for on the ground and among trees. Both species live in small groups of related individuals and jointly defend a territory. The oldest pair mates, while the others help to nest build and feed the young. There are five species of jay in Costa Rica.
The American flycatchers are a very large and diverse group of birds with about 75 species in Costa Rica. Many of the small drab species are difficult to identify but the scissor-tailed flycatcher (tijereta rosada, Tyrannus forficatus) is both handsome and easily seen as it adopts the typical flycatcher technique, perching motionless on a fence to dart out and grab a passing insect and then return to the same perch to eat it. This flycatcher is a non-breeding migrant found in open areas such as fields, marshes and human settlements on the northern Pacific slope. It is a medium sized, silver-grey bird, about 20 cm in length, with a long (15 cm) black, forked tail, black wings with reddish patches under them and a white chest. Another bright and frequently seen flycatcher is the great kiskadee (bienteveo grande, Pitangus sulphuratus), which is a medium-sized (23 cm) bird, with an olive brown back, chestnut wings, a bright yellow chest and belly, a white throat and a black and white head. It tends to be found in trees in quite open sites such as in gardens, along the forest edge and in grassland. Along with catching insects, the great kiskadee also eats frogs and lizards and even small fish.
Some of the most colourful of Costa Rica’s passerines are the 50 or so species of tanagers found there; included in this group are honeycreepers and euphonias. They are found in forested and shrubby areas over a wide range of elevations, tending to be in more open places and often seen near human habitation in mixed-species flocks foraging for fruit. Most tanagers are arboreal and eat small fruits and berries, though some are ground foragers and some eat insects. The honeycreepers feed on nectar, which they suck out after making holes at the base of a flower with their bill; they also take insects and fruit. The blue-gray tanager (tangara azuleja, Thraupis episcopus) is abundant and found over most of the country at all elevations, often near towns and villages, in parks and along forest edges. As its name implies, it is a blue-grey bird, with a darker blue back and bright blue wings and tail, the female being duller in colour. The male scarlet-rumped tanager (tangara lomiescarlata, Ramphocelus passerinii), is about the same size (16 cm) as the blue-gray tanager, but is black with a conspicuous red rump and pale blue-grey beak. The female is yellowish-olive with a grey head and throat and a yellow-orange rump, chest and belly. Euphonia males are typically blue-black above, with yellow foreheads, breasts and bellies, while the females tend to be olive-green with duller yellow fronts. Many of the male honeycreepers are brilliantly coloured. Typical of these is the red-legged honeycreeper (mielero patirrojo, Cyanerpes cyaneus), which is a bright blue bird with a black back, wings, tail and eyestripe, a turquoise patch on top of his head and red legs. The female is overall yellowish green, but also has red legs. This species may well be seen in gardens and plantations and also on the edges of drier forests in the north of the country.
Though they are small (9-19 cm), stocky birds, male manakins are noted for both their colourful plumage and their elaborate courtship diplays. They are very active, forest dwelling birds, foraging in the understorey for small fruits and some insects. One very attractive species is the long-tailed manakin (saltarín colilargo, Chiroxiphia linearis), which is found in forests on the northern Pacific slope. The male is black with a bright blue back, a red crest on his head and two very long, black tail feathers. The female is olive green, with a more yellow-green front and orange legs and she lacks the long tail feathers. The female white-collared manakin (saltarín cuelliblanco, Manacus candei) is also a small olive-green bird, but the male has a bright yellow belly, black on his wings and on the top of his head, an olive rump and a white throat and chest. This species is found in low elevation, wet forest on the Caribbean side of Costa Rica. During the breeding season, from February to July, manakin males display at particular sites in bushes, on tree branches or on the forest floor; generally several males display in the same area – the lekking site. They try to attract females with both visual and vocal displays, involving elaborate courtship dances, the movements in which are species specific. In some species, including the long-tailed manakin, two or three males do a coordinated dance on the same perch. Once a female has selected the male she considers to be the most spectacular and has mated with him, she goes off to nest-build, incubate and rear the young on her own.
Closely related to the manakins are the cotingas. This is a very diverse group containing bellbirds, umbrella birds, phias and fruit crows as well as typical cotingas, though there are only 10 species in Costa Rica. The cotingas eat mainly fruit, finding it high up in the canopy of the forest, though some eat insects as well. The bellbirds, though, stick to a strictly frugivorous diet, even, unusually, feeding fruit to their chicks. The nestlings, consequently, take longer to develop as their diet is low in protein. The male three-wattled bellbird (pájaro campana, Procnias tricarunculata) is a medium-sized (20 cm), brown bird with a white head and three odd-looking, worm-like appendages or wattles, hanging from his bill. The female is olive-green with a yellow-streaked front. Also strangely ornamented is the male bare-necked umbrella bird (pájaro-sombrilla, Cephalopterus glabricollis), a mostly black bird with a large red throat sac that is inflated during displays and also an umbrella-shaped black crest. This umbrella bird is only sparsely distributed and is threatened by habitat destruction as it breeds in highland forests, but overwinters in lowland forests, so requires both habitats in the same area and a forest corridor connecting them. Somewhat more common is the snowy cotinga (cotinga nivosa, Carpodectes nitidus), which is found in wet forests at low elevation on the Caribbean slope and in more open wooded areas. The male is pale grey above and white below, while the female is overall more grey.