size among the Passeriformes, and some of the larger species show high levels of intelligence. Tits, chickadees, and titmice Order: PasseriformesFamily: Paridae The Paridae are mainly small stocky woodland species with short stout bills. Some have crests. They are adaptable birds, with a mixed diet including seeds and insects. Penduline-tits Order: PasseriformesFamily: Remizidae The penduline-tits are a group of small passerine birds related to the true tits. They are insectivores. Larks Order: PasseriformesFamily: Alaudidae Larks are small terrestrial birds with often extravagant songs and display flights. Most larks are fairly dull in appearance. Their food is insects and seeds. Cisticolas and allies Order: PasseriformesFamily: Cisticolidae The Cisticolidae are warblers found mainly in warmer southern regions of the Old World. They are generally very small birds of drab brown or grey appearance found in open country such as grassland or scrub. Reed warblers and allies Order: PasseriformesFamily: Acrocephalidae The members of this family are usually rather large for "warblers". Most are rather plain olivaceous brown above with much yellow to beige below. They are usually found in open woodland, reedbeds, or tall grass. The family occurs mostly in southern to western Eurasia and surroundings, but it also ranges far into the Pacific, with some species in Africa. Grassbirds and allies Order: PasseriformesFamily: Locustellidae Locustellidae are a family of small insectivorous songbirds found mainly in Eurasia, Africa, and the Australian region. They are smallish birds with tails that are usually long and pointed, and tend to be drab brownish or buffy all over. Swallows Order: PasseriformesFamily: Hirundinidae The family Hirundinidae is adapted to aerial feeding. They have a slender streamlined body, long pointed wings and a short bill with a wide gape. The feet are adapted to perching rather than walking, and the front toes are partially joined at the base. Leaf warblers Order: PasseriformesFamily: Phylloscopidae Leaf warblers are a family of small insectivorous birds found mostly in Eurasia and ranging into Wallacea and Africa. The species are of various sizes, often green-plumaged above and yellow below, or more subdued with greyish-green to greyish-brown colours. Bush warblers and allies Order: PasseriformesFamily: Scotocercidae The members of this family are found throughout Africa, Asia, and Polynesia. Their taxonomy is in flux, and some authorities place some genera in other families. Long-tailed tits Order: PasseriformesFamily: Aegithalidae Long-tailed tits are a group of small passerine birds with medium to long tails. They make woven bag nests