rajpurkar/squad huggingface dataset:
Title: Bird

Plumage is regularly moulted; the standard plumage of a bird that has moulted after breeding is known as the "non-breeding" plumage, or—in the Humphrey-Parkes terminology—"basic" plumage; breeding plumages or variations of the basic plumage are known under the Humphrey-Parkes system as "alternate" plumages. Moulting is annual in most species, although some may have two moults a year, and large birds of prey may moult only once every few years. Moulting patterns vary across species. In passerines, flight feathers are replaced one at a time with the innermost primary being the first. When the fifth of sixth primary is replaced, the outermost tertiaries begin to drop. After the innermost tertiaries are moulted, the secondaries starting from the innermost begin to drop and this proceeds to the outer feathers (centrifugal moult). The greater primary coverts are moulted in synchrony with the primary that they overlap. A small number of species, such as ducks and geese, lose all of their flight feathers at once, temporarily becoming flightless. As a general rule, the tail feathers are moulted and replaced starting with the innermost pair. Centripetal moults of tail feathers are however seen in the Phasianidae. The centrifugal moult is modified in the tail feathers of woodpeckers and treecreepers, in that it begins with the second innermost pair of feathers and finishes with the central pair of feathers so that the bird maintains a functional climbing tail. The general pattern seen in passerines is that the primaries are replaced outward, secondaries inward, and the tail from center outward. Before nesting, the females of most bird species gain a bare brood patch by losing feathers close to the belly. The skin there is well supplied with blood vessels and helps the bird in incubation.

Question: What is regularly moulted?
Answer: Plumage

Question: What is the standard plumage of a bird that has moulted after breeding?
Answer: "non-breeding" plumage

Question: How often does moulting occur in most species?
Answer: annual

Question: What type of birds may moult only once every few years?
Answer: large birds of prey
Title: Bird

Feathers require maintenance and birds preen or groom them daily, spending an average of around 9% of their daily time on this. The bill is used to brush away foreign particles and to apply waxy secretions from the uropygial gland; these secretions protect the feathers' flexibility and act as an antimicrobial agent, inhibiting the growth of feather-degrading bacteria. This may be supplemented with the secretions of formic acid from ants, which birds receive through a behaviour known as anting, to remove feather parasites.

Question: How often do birds groom their feathers?
Answer: daily

Question: What percentage of their day do birds groom their feathers?
Answer: 9%

Question: What do birds use to brush away foreign particles?
Answer: The bill

Question: What is the process of removing feather parasites?
Answer: anting
Title: Bird

Most birds can fly, which distinguishes them from almost all other vertebrate classes. Flight is the primary means of locomotion for most bird species and is used for breeding, feeding, and predator avoidance and escape. Birds have various adaptations for flight, including a lightweight skeleton, two large flight muscles, the pectoralis (which accounts for 15% of the total mass of the bird) and the supracoracoideus, as well as a modified forelimb (wing) that serves as an aerofoil. Wing shape and size generally determine a bird species' type of flight; many birds combine powered, flapping flight with less energy-intensive soaring flight. About 60 extant bird species are flightless, as were many extinct birds. Flightlessness often arises in birds on isolated islands, probably due to limited resources and the absence of land predators. Though flightless, penguins use similar musculature and movements to "fly" through the water, as do auks, shearwaters and dippers.

Question: What distinguishes birds from almost all other vertebrate classes?
Answer: Most birds can fly,

Question: What is the primary means of locomotion for most bird species?
Answer: Flight

Question: How many large flight muscles do birds have?
Answer: two

Question: Pectoralis account for what percentage of total mass of a bird?
Answer: 15%

Question: Approximately how many extant bird species are flightless?
Answer: 60
Title: Bird

Birds that employ many strategies to obtain food or feed on a variety of food items are called generalists, while others that concentrate time and effort on specific food items or have a single strategy to obtain food are considered specialists. Birds' feeding strategies vary by species. Many birds glean for insects, invertebrates, fruit, or seeds. Some hunt insects by suddenly attacking from a branch. Those species that seek pest insects are considered beneficial 'biological control agents' and their presence encouraged in biological pest control programs. Nectar feeders such as hummingbirds, sunbirds, lories, and lorikeets amongst others have specially adapted brushy tongues and in many cases bills designed to fit co-adapted flowers. Kiwis and shorebirds with long bills probe for invertebrates; shorebirds' varied bill lengths and feeding methods result in the separation of ecological niches. Loons, diving ducks, penguins and auks pursue their prey underwater, using their wings or feet for propulsion, while aerial predators such as sulids, kingfishers and terns plunge dive after their prey. Flamingos, three species of prion, and some ducks are filter feeders. Geese and dabbling ducks are primarily grazers.

Question: What is the term used for birds that employ many strategies to obtain food?
Answer: generalists

Question: What is the term used for birds that concentrate time and effort on specific food items?
Answer: specialists

Question: What type of birds have specially adapted brushy tongues?
Answer: Nectar feeders
Title: Bird

Some species, including frigatebirds, gulls, and skuas, engage in kleptoparasitism, stealing food items from other birds. Kleptoparasitism is thought to be a supplement to food obtained by hunting, rather than a significant part of any species' diet; a study of great frigatebirds stealing from masked boobies estimated that the frigatebirds stole at most 40% of their food and on average stole only 5%. Other birds are scavengers; some of these, like vultures, are specialised carrion eaters, while others, like gulls, corvids, or other birds of prey, are opportunists.

Question: What is the term for stealing food items from other birds?
Answer: kleptoparasitism

Question: What is kleptoparasitism?
Answer: stealing food items from other birds

Question: A vulture is what type of bird?
Answer: scavengers
Title: Bird

Most birds scoop water in their beaks and raise their head to let water run down the throat. Some species, especially of arid zones, belonging to the pigeon, finch, mousebird, button-quail and bustard families are capable of sucking up water without the need to tilt back their heads. Some desert birds depend on water sources and sandgrouse are particularly well known for their daily congregations at waterholes. Nesting sandgrouse and many plovers carry water to their young by wetting their belly feathers. Some birds carry water for chicks at the nest in their crop or regurgitate it along with food. The pigeon family, flamingos and penguins have adaptations to produce a nutritive fluid called crop milk that they provide to their chicks.

Question: How do nesting sandgrouse carry water to their young?
Answer: wetting their belly feathers

Question: What is one family of birds have adaptations to produce a nutritive fluid to their chicks?
Answer: The pigeon family

Question: What is a nutritive fluid that some birds provide to their chicks?
Answer: crop milk

Question: What is crop milk?
Answer: a nutritive fluid
Title: Bird

Feathers being critical to the survival of a bird, require maintenance. Apart from physical wear and tear, feathers face the onslaught of fungi, ectoparasitic feather mites and birdlice. The physical condition of feathers are maintained by preening often with the application of secretions from the preen gland. Birds also bathe in water or dust themselves. While some birds dip into shallow water, more aerial species may make aerial dips into water and arboreal species often make use of dew or rain that collect on leaves. Birds of arid regions make use of loose soil to dust-bathe. A behaviour termed as anting in which the bird encourages ants to run through their plumage is also thought to help them reduce the ectoparasite load in feathers. Many species will spread out their wings and expose them to direct sunlight and this too is thought to help in reducing fungal and ectoparasitic activity that may lead to feather damage.

Question: Birds preen often with the application of secretions from which gland?
Answer: preen gland

Question: What do birds bathe in?
Answer: water or dust

Question: What is anting?
Answer: bird encourages ants to run through their plumage

Question: What is it called when birds encourage ants to run through their plumage?
Answer: anting
Title: Bird

Many bird species migrate to take advantage of global differences of seasonal temperatures, therefore optimising availability of food sources and breeding habitat. These migrations vary among the different groups. Many landbirds, shorebirds, and waterbirds undertake annual long distance migrations, usually triggered by the length of daylight as well as weather conditions. These birds are characterised by a breeding season spent in the temperate or polar regions and a non-breeding season in the tropical regions or opposite hemisphere. Before migration, birds substantially increase body fats and reserves and reduce the size of some of their organs. Migration is highly demanding energetically, particularly as birds need to cross deserts and oceans without refuelling. Landbirds have a flight range of around 2,500 km (1,600 mi) and shorebirds can fly up to 4,000 km (2,500 mi), although the bar-tailed godwit is capable of non-stop flights of up to 10,200 km (6,300 mi). Seabirds also undertake long migrations, the longest annual migration being those of sooty shearwaters, which nest in New Zealand and Chile and spend the northern summer feeding in the North Pacific off Japan, Alaska and California, an annual round trip of 64,000 km (39,800 mi). Other seabirds disperse after breeding, travelling widely but having no set migration route. Albatrosses nesting in the Southern Ocean often undertake circumpolar trips between breeding seasons.

Question: When do birds substantially increase body fats and reduce the size of some of their organs?
Answer: Before migration

Question: What is the flight range of landbirds?
Answer: 2,500 km (1,600 mi)

Question: What is the flight range of shoebirds?
Answer: 4,000 km (2,500 mi)

Question: Which bird is capable of non-stop flights of up to 6,300 miles?
Answer: bar-tailed godwit

Question: Which birds often undertake circumpolar trips between breeding seasons?
Answer: Albatrosses nesting in the Southern Ocean
Title: Bird

Some bird species undertake shorter migrations, travelling only as far as is required to avoid bad weather or obtain food. Irruptive species such as the boreal finches are one such group and can commonly be found at a location in one year and absent the next. This type of migration is normally associated with food availability. Species may also travel shorter distances over part of their range, with individuals from higher latitudes travelling into the existing range of conspecifics; others undertake partial migrations, where only a fraction of the population, usually females and subdominant males, migrates. Partial migration can form a large percentage of the migration behaviour of birds in some regions; in Australia, surveys found that 44% of non-passerine birds and 32% of passerines were partially migratory. Altitudinal migration is a form of short distance migration in which birds spend the breeding season at higher altitudes elevations and move to lower ones during suboptimal conditions. It is most often triggered by temperature changes and usually occurs when the normal territories also become inhospitable due to lack of food. Some species may also be nomadic, holding no fixed territory and moving according to weather and food availability. Parrots as a family are overwhelmingly neither migratory nor sedentary but considered to either be dispersive, irruptive, nomadic or undertake small and irregular migrations.

Question: In Australia, what percentage of non-passerine birds were partially migratory
Answer: 44%

Question: In Australia, what percentage of passerine birds were partially migratory
Answer: 32%

Question: What is most often triggered by temperature changes?
Answer: Altitudinal migration

Question: Which family of birds are neither migratory or sedentary but considered to be dispersive, irruptive or nomadic?
Answer: Parrots
Title: Bird

The ability of birds to return to precise locations across vast distances has been known for some time; in an experiment conducted in the 1950s a Manx shearwater released in Boston returned to its colony in Skomer, Wales, within 13 days, a distance of 5,150 km (3,200 mi). Birds navigate during migration using a variety of methods. For diurnal migrants, the sun is used to navigate by day, and a stellar compass is used at night. Birds that use the sun compensate for the changing position of the sun during the day by the use of an internal clock. Orientation with the stellar compass depends on the position of the constellations surrounding Polaris. These are backed up in some species by their ability to sense the Earth's geomagnetism through specialised photoreceptors.

Question: In which type of migration do birds use the sun to navigate by day and a stellar compass at night?
Answer: diurnal migrants

Question: Some species use specialised photoreceptors to sense what?
Answer: the Earth's geomagnetism

Question: What do birds to compensate for the changing position of the sun during the day?
Answer: internal clock
Title: Bird

Birds sometimes use plumage to assess and assert social dominance, to display breeding condition in sexually selected species, or to make threatening displays, as in the sunbittern's mimicry of a large predator to ward off hawks and protect young chicks. Variation in plumage also allows for the identification of birds, particularly between species. Visual communication among birds may also involve ritualised displays, which have developed from non-signalling actions such as preening, the adjustments of feather position, pecking, or other behaviour. These displays may signal aggression or submission or may contribute to the formation of pair-bonds. The most elaborate displays occur during courtship, where "dances" are often formed from complex combinations of many possible component movements; males' breeding success may depend on the quality of such displays.

Question: What allows for the identification of birds, particularly between species?
Answer: Variation in plumage

Question: What do birds sometimes use to assess and assert social dominance?
Answer: plumage

Question: Visual communication among birds may involve what kind of displays?
Answer: ritualised displays
Title: Bird

Calls are used for a variety of purposes, including mate attraction, evaluation of potential mates, bond formation, the claiming and maintenance of territories, the identification of other individuals (such as when parents look for chicks in colonies or when mates reunite at the start of breeding season), and the warning of other birds of potential predators, sometimes with specific information about the nature of the threat. Some birds also use mechanical sounds for auditory communication. The Coenocorypha snipes of New Zealand drive air through their feathers, woodpeckers drum territorially, and palm cockatoos use tools to drum.

Question: What do some birds use for auditory communication?
Answer: mechanical sounds

Question: What do birds use for evaluation of potential mates and mate attraction?
Answer: Calls

Question: Which birds drum territorially?
Answer: woodpeckers

Question: Which type of birds use tools to drum?
Answer: palm
Title: Bird

While some birds are essentially territorial or live in small family groups, other birds may form large flocks. The principal benefits of flocking are safety in numbers and increased foraging efficiency. Defence against predators is particularly important in closed habitats like forests, where ambush predation is common and multiple eyes can provide a valuable early warning system. This has led to the development of many mixed-species feeding flocks, which are usually composed of small numbers of many species; these flocks provide safety in numbers but increase potential competition for resources. Costs of flocking include bullying of socially subordinate birds by more dominant birds and the reduction of feeding efficiency in certain cases.

Question: What are the principal benefits of flocking?
Answer: safety in numbers and increased foraging efficiency

Question: What is a cost of flocking?
Answer: bullying of socially subordinate birds by more dominant birds

Question: What is particularly important in closed habitats like forests?
Answer: Defence against predators
Title: Bird

The high metabolic rates of birds during the active part of the day is supplemented by rest at other times. Sleeping birds often use a type of sleep known as vigilant sleep, where periods of rest are interspersed with quick eye-opening "peeks", allowing them to be sensitive to disturbances and enable rapid escape from threats. Swifts are believed to be able to sleep in flight and radar observations suggest that they orient themselves to face the wind in their roosting flight. It has been suggested that there may be certain kinds of sleep which are possible even when in flight. Some birds have also demonstrated the capacity to fall into slow-wave sleep one hemisphere of the brain at a time. The birds tend to exercise this ability depending upon its position relative to the outside of the flock. This may allow the eye opposite the sleeping hemisphere to remain vigilant for predators by viewing the outer margins of the flock. This adaptation is also known from marine mammals. Communal roosting is common because it lowers the loss of body heat and decreases the risks associated with predators. Roosting sites are often chosen with regard to thermoregulation and safety.

Question: Sleeping birds often use a type of sleep known as what?
Answer: vigilant sleep

Question: What are believed to be able to sleep in flight?
Answer: Swifts

Question: Why is communal roosting common?
Answer: because it lowers the loss of body heat
Title: Bird

Many sleeping birds bend their heads over their backs and tuck their bills in their back feathers, although others place their beaks among their breast feathers. Many birds rest on one leg, while some may pull up their legs into their feathers, especially in cold weather. Perching birds have a tendon locking mechanism that helps them hold on to the perch when they are asleep. Many ground birds, such as quails and pheasants, roost in trees. A few parrots of the genus Loriculus roost hanging upside down. Some hummingbirds go into a nightly state of torpor accompanied with a reduction of their metabolic rates. This physiological adaptation shows in nearly a hundred other species, including owlet-nightjars, nightjars, and woodswallows. One species, the common poorwill, even enters a state of hibernation. Birds do not have sweat glands, but they may cool themselves by moving to shade, standing in water, panting, increasing their surface area, fluttering their throat or by using special behaviours like urohidrosis to cool themselves.

Question: These types of birds have a tendon locking mechanism.
Answer: Perching birds

Question: Where do many ground birds, such as quails and pheasants, roost?
Answer: in trees

Question: A few parrots of what genus roost hanging upside down?
Answer: Loriculus

Question: What type of birds go into a nightly state of torpor?
Answer: Some hummingbirds

Question: Birds do not have what type of glands:?
Answer: sweat
Title: Bird

Ninety-five percent of bird species are socially monogamous. These species pair for at least the length of the breeding season or—in some cases—for several years or until the death of one mate. Monogamy allows for both paternal care and biparental care, which is especially important for species in which females require males' assistance for successful brood-rearing. Among many socially monogamous species, extra-pair copulation (infidelity) is common. Such behaviour typically occurs between dominant males and females paired with subordinate males, but may also be the result of forced copulation in ducks and other anatids. Female birds have sperm storage mechanisms that allow sperm from males to remain viable long after copulation, a hundred days in some species. Sperm from multiple males may compete through this mechanism. For females, possible benefits of extra-pair copulation include getting better genes for her offspring and insuring against the possibility of infertility in her mate. Males of species that engage in extra-pair copulations will closely guard their mates to ensure the parentage of the offspring that they raise.

Question: What percent of bird species are socially monogamous?
Answer: Ninety-five percent

Question: What do female birds have that allow sperm from males to remain viable long after copulation?
Answer: sperm storage mechanisms

Question: What is extra-pair copulation?
Answer: infidelity

Question: Why do males that engage in extra-pair copulation closely guard their mates?
Answer: to ensure the parentage of the offspring that they raise
Title: Bird

Breeding usually involves some form of courtship display, typically performed by the male. Most displays are rather simple and involve some type of song. Some displays, however, are quite elaborate. Depending on the species, these may include wing or tail drumming, dancing, aerial flights, or communal lekking. Females are generally the ones that drive partner selection, although in the polyandrous phalaropes, this is reversed: plainer males choose brightly coloured females. Courtship feeding, billing and allopreening are commonly performed between partners, generally after the birds have paired and mated.

Question: Which gender typically performs some form of courtship display?
Answer: male

Question: Most courtship displays involve some type of what?
Answer: song

Question: Which gender generally drive partner selection?:
Answer: Females

Question: Generally, when is courtship feeding and billing performed between partners?
Answer: after the birds have paired and mated
Title: Bird

All birds lay amniotic eggs with hard shells made mostly of calcium carbonate. Hole and burrow nesting species tend to lay white or pale eggs, while open nesters lay camouflaged eggs. There are many exceptions to this pattern, however; the ground-nesting nightjars have pale eggs, and camouflage is instead provided by their plumage. Species that are victims of brood parasites have varying egg colours to improve the chances of spotting a parasite's egg, which forces female parasites to match their eggs to those of their hosts.

Question: What kind of eggs to all birds lay?
Answer: amniotic eggs

Question: All birds lay eggs with hard shells made mostly out of what?
Answer: calcium carbonate

Question: What type of birds lay white or pale eggs?
Answer: Hole and burrow nesting species

Question: What kind of eggs do open nesters lay?
Answer: camouflaged eggs