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Brief Summary

    Australian pelican: Brief Summary
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    The Australian pelican (Pelecanus conspicillatus) is a large waterbird of the family Pelecanidae, widespread on the inland and coastal waters of Australia and New Guinea, also in Fiji, parts of Indonesia and as a vagrant in New Zealand. It is a predominantly white bird with black wings and a pink bill. It has been recorded as having the longest bill of any living bird. It mainly eats fish, but will also consume birds and scavenges for scraps if the opportunity arrises.

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Comprehensive Description

    Australian pelican
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    The Australian pelican (Pelecanus conspicillatus) is a large waterbird of the family Pelecanidae, widespread on the inland and coastal waters of Australia and New Guinea, also in Fiji, parts of Indonesia and as a vagrant in New Zealand. It is a predominantly white bird with black wings and a pink bill. It has been recorded as having the longest bill of any living bird. It mainly eats fish, but will also consume birds and scavenges for scraps if the opportunity arrises.

    Taxonomy

    The Australian pelican was first described by Dutch naturalist Coenraad Jacob Temminck in 1824. Its specific epithet is derived from the Latin verb conspicere, meaning 'to behold', and refers to the 'spectacled' appearance created by its conspicuous eye markings.[2]

    Description

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    An Australian pelican in flight

    The Australian pelican is medium-sized by pelican standards, with a wingspan of 2.3 to 2.6 m (7.5 to 8.5 ft).[3] Weight can range from 4 to 13 kg (8.8 to 28.7 lb), although most of these pelicans weigh between 4.54 and 7.7 kg (10.0 and 17.0 lb).[4][5][6] The pale, pinkish bill is enormous, even by pelican standards, and is the largest bill in the avian world. The record-sized bill was 50 cm (20 in) long.[7] Females are slightly smaller with a notably smaller bill, which can measure as small as 34.6 cm (13.6 in) at maturity. The total length is boosted by the bill to 152–188 cm (60–74 in), which makes it rank alongside the Dalmatian pelican as the longest of pelicans.[8] It has the largest bill of any bird.

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    Pelican showing length of beak and size of pouch

    Overall, the Australian pelican is predominantly white in colour. There is a white panel on the upper-wing and a white-V on the rump set against black along the primaries. During courtship, the orbital skin and distal quarter of the bill are orange-coloured with the pouch variously turning dark blue, pink and scarlet. The non-breeding adult has its bill and eye-ring a pale yellow and the pouch is a pale pinkish. Juvenile birds are similar to the adults, but with black replaced with brown and the white patch on upper wing reduced. Overall, their appearance is somewhat similar to several other pelicans, though the species is allopatric.[8]

    Distribution and habitat

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    Swimming
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    At Centenary Lakes, Cairns, Queensland, Australia

    This species can occur in large expanses of mainland Australia and Tasmania. Australian pelicans occur primarily in large expanses of open water without dense aquatic vegetation. The habitats that can support them include large lakes, reservoirs, billabongs and rivers, as well as estuaries, swamps, temporarily flooded areas in arid zones, drainage channels in farmland, salt evaporation ponds and coastal lagoons. The surrounding environment is unimportant: it can be forest, grassland, desert, estuarine mudflats, an ornamental city park, or industrial wasteland, provided only that there is open water able to support a sufficient supply of food. However, they do seem to prefer areas where disturbance is relatively low while breeding. They may also roost on mudflats, sandbars, beaches, reefs, jetties and pilings.[8]

    The species became first known to occur in New Zealand from a specimen shot at Jerusalem in 1890 and small numbers of subfossil bones, the first found at Lake Grassmere in 1947, followed by records of other stray individuals. The bones were later described as a new (sub)species, Pelecanus (conspicillatus) novaezealandiae (Scarlett, 1966: "New Zealand pelican") as they appeared to be larger, but Worthy (1998), reviewing new material, determined that they were not separable from the Australian population. These fossils were first found in 1930.

    Australian pelicans follow no particular schedule of regular movement, simply following the availability of food supplies. Drought frequently precedes movements. When the normally barren Lake Eyre filled during 1974 to 1976, for example, only a handful of pelicans remained around the coastal cities: when the great inland lakes dried again, the population dispersed once more, flocks of thousands being seen on the northern coasts. On some occasions, they are simply blown by the wind to new locations. It is a fairly regular visitor to the southern coast of New Guinea, as well as the Bismarck Islands and Solomon Islands. It occurs as a vagrant to Christmas Island, Vanuatu, Fiji, Palau and New Zealand. A population irruption occurred in 1978 into Indonesia, with Australian pelicans reaching Sulawesi, Java and possibly also Sumatra.[8]

    Feeding

    Australian pelicans feed by plunge-diving while swimming on the surface of the water. They work in groups to drive fish to shallower water, where they stick their sensitive bills in to snatch their prey. Some feeding grounds in large bodies of water have included up to 1,900 individual birds. They will sometimes also forage solitarily. Their predominant prey is fish and they commonly feed on introduced species such as goldfish, European carp and European perch. When possible, they also eat native fish, with a seeming preference for the perch Leiopotherapon unicolor. However, the Australian pelican seems to be less of a piscivore and more catholic in taste than other pelicans. It regularly feeds on insects and many aquatic crustaceans, especially the common yabby and the shrimps in the genus Macrobrachium. This pelican also takes other birds with some frequency, such as silver gulls, Australian white ibis and grey teal, including eggs, nestlings, fledglings and adults, which they may kill by pinning them underwater and drowning them.[8][9] Reptiles and amphibians are also taken when available. Reportedly even small dogs have been swallowed. The Australian pelican is an occasional kleptoparasite of other water birds, such as cormorants.[8] Cannibalism of young pelicans has also been reported.[9]

    Breeding

    Samsonvale Cemetery, south-east Queensland, Australia

    The Australian pelican begins breeding at two or three years of age. The breeding season varies, occurring in winter in tropical areas (north of 26°S) and spring in parts of southern Australia. Breeding may occur any time after rainfall in inland areas. The nest is a shallow depression in earth or sand, sometimes with some grass lining. Grassy platforms are constructed at Lake Alexandrina in South Australia. Rarely, slightly more elaborate nests have also been observed on top of Muehlenbeckia florulenta bushes.[8] Nesting is communal, with colonies located on islands (such as the North Peron Island) or sheltered areas in the vicinity of lakes or the sea. Breeding Australian pelicans will lay one to four (typically two) chalky-white eggs measuring 93 mm × 57 mm (3.7 in × 2.2 in), which often appear scratched and dirty.[10] The eggs are incubated for 32 to 35 days. The chicks are naked when they hatch, though quickly grow grey down feathers. After they hatch, the larger one will be fed more, and the smaller one will eventually die of starvation or siblicide. For the first two weeks the chicks will be fed regurgitated liquid, but for the remaining two months they will be fed fish and some invertebrates. Feeding pods are formed within colonies when the chicks are around 25 days. The young pelicans fledge at around three months of age.

    Status

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    Resting on Monkey Mia's beach

    The Australian pelican is not globally threatened. They are usually fairly common in proper habitats. At the aforementioned temporary inundation of Lake Eyre in March 1990, over 200,000 adult birds were found to be breeding. The species is legally protected and does not seem to be showing any immediate adverse effects from pollution.

    In several areas, such as the beach at Monkey Mia, Western Australia and at The Entrance, New South Wales, pelicans may associate with humans and may even beg for hand-outs; however, they are quite sensitive to human disturbances while nesting. They will readily adapt to artificial bodies of water such as reservoirs so long as there is no regular boating in them. Due to the popularity of open water sports, the habitat of this pelican has suffered considerably less than more vegetated wetlands throughout Australia.[8] The Australian pelican is evaluated as Least Concern on the IUCN Red List of Threatened Species.[1]

    References

    1. ^ a b BirdLife International (2012). "Pelecanus conspicillatus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
    2. ^ Jobling, James A. (2010) Helm Dictionary of Scientific Bird Names, 2nd ed., Christopher Helm, London.
    3. ^ Birds in Backyard
    4. ^ Australian Animals — Pelican (2010).
    5. ^ Species — Marine Biology (2010).
    6. ^ CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5
    7. ^ [1] (2011).
    8. ^ a b c d e f g h del Hoyo, J; Elliot, A; Sargatal, J (1996). Handbook of the Birds of the World. 3. Barcelona: Lynx Edicions. ISBN 84-87334-20-2.
    9. ^ a b Smith, A.C.M. & U. Munro (2008). "Cannibalism in the Australian Pelican (Pelecanus conspicillatus) and Australian White Ibis (Threskiornis molucca)". Waterbirds: The International Journal of Waterbird Biology. 31 (4): 632–635.
    10. ^ Beruldsen, G (2003). Australian Birds: Their Nests and Eggs. Kenmore Hills, Qld: self. p. 187. ISBN 0-646-42798-9.
    • Scarlett, R. J. (1966): A Pelican in New Zealand. Notornis 13(4): 204-217. PDF fulltext
    • Worthy, Trevor H. (1998): A remarkable fossil and archaeological fauna from Marfells Beach, Lake Grassmere, South Island, New Zealand. Records of the Canterbury Museum 12: 79-176.
    • Australian PelicanAustralian Museum Online

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Distribution

    Distribution
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    Australian pelicans (Pelecanus conspicillatus) are native to Australia, Indonesia, Papua New Guinea, Solomon Islands, and Timor-Leste and vagrant to Fiji, Nauru, New Caledonia, New Zealand, Palau, and Vanuatu.

    Biogeographic Regions: australian (Native ); oceanic islands (Native )

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Morphology

    Morphology
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    Australian pelicans are one of the largest flying birds. They feature a wingspan of 2.3 to 2.5 m and can weigh from 4 to 6.8 kg. They have the longest bill length of any extant bird ranging from 36 to cm. The average bill length of males is between 42 and 46 cm and in females from 36 to 41 cm. Between the bones on the lower bill is a stretchy patch of skin called the gular pouch. The gular pouch will stretch when it is filled with water and can hold up to three gallons. Pelicans also have a large nail on the tip of the upper part of the bill. They have short legs and large feet with webbing between all four toes.

    Non-breeding adults have primarily white plumage. The lower back, primary wing feathers are all black. These pelicans have dark brown eyes. The bill is light pink, as is the gular pouch. The beak can also feature a dark blue stripe and the nail on the tip of the bill is yellow to orange. Their legs, feet and webbing are grey to blue-grey.

    Juvenile Australian pelicans are primarily brown in color. The plumage on the head can vary from white to brown. The bill and the gular pouch are a light pink in color. Unlike non-breeding adult Australian pelicans the feet and legs are brownish grey in color instead of blueish grey.

    Sexual dimorphism in this species only applies to size not plumage. Males are larger than females, but the plumage in both sexes is identical.

    Range mass: 4 to 6.8 kg.

    Range length: 1.6 to 1.9 m.

    Range wingspan: 2.3 to 2.5 m.

    Other Physical Features: endothermic ; homoiothermic; bilateral symmetry

    Sexual Dimorphism: sexes alike; male larger

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Habitat

    Habitat
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    Australian pelicans live very close to water in coastal inlets, shorelines, lakes, swamps and rivers of the interior. They will reside in almost any area that supports a large abundance of fish, but their major habitat is the marine intertidal zone including sandy shoreline, sandbars and spits.

    Average elevation: 0 m.

    Average depth: 0 m.

    Habitat Regions: tropical ; terrestrial ; saltwater or marine ; freshwater

    Aquatic Biomes: lakes and ponds; rivers and streams; coastal

    Wetlands: marsh ; swamp

    Other Habitat Features: riparian ; estuarine

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Trophic Strategy

    Trophic Strategy
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    Fish is the main bulk of Australian pelicans' diet. They also have been known to eat prawns, amphibians, small reptiles and small mammals. These pelicans eat fish that are between 60 to 247 mm long and weigh 17 to 320 grams. Crustaceans make up a minor part of the diet, but it includes freshwater crayfish and shrimp.

    Australian pelicans feed by primarily using a bill thrusting technique commonly used in other pelican species. This technique consists of tipping forward and thrusting their bill underwater to grab fish or other food items. Other times Australian pelicans will scoop the food up with their bills from shallow waters or while swimming and even when they are flying low over the surface of the water. Every so often this species is reported being seen plunging into the water from a meter or so in the air. When flocks group together to forage they corral the fish into shallow or confined areas so that they can be easily captured. Australian pelicans have been described as an opportunistic feeder meaning they will scavenge and even pirate food from other animals. In times of scarce food resources, they will even eat the young of gulls and ducklings.

    Animal Foods: birds; amphibians; reptiles; fish; aquatic crustaceans

    Primary Diet: carnivore (Piscivore )

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Associations

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    Australian pelicans play a role in dispersing plant species across their habitat. They eat fish that eat vegetation in one area. Then when the pelican moves on to another location the plant propagules are transplanted to the new location through the pelican's feces. This allows for the movement of plant species and also recolonization of plant-lacking wetlands. This dispersal can also be problematic because this may allow for the invasion and spread of exotic plant species.

    Several species of nematodes (Contracaecum pyripapillatum and Contracaecum multipapillatum) use Australian pelicans as hosts.

    Ecosystem Impact: disperses seeds

    Commensal/Parasitic Species:

    • Nematodes Contracaecum pyripapillatum
    • Nematodes Contracaecum multipapillatum
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    Associations
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    Australian pelicans have very few predators, but within ground-nesting breeding colonies the chicks are vulnerable. Australian ravens are common predators of Australian pelican chicks. As are certain mammalian predators such as domestic dogs. Another threat to chicks are courting adults. They will move through the colony and accidentally crush eggs and destroy nests.

    Australian pelican chicks' primary anti-predator defense is their formation of creches. These groups can reach sizes of 100 individuals, which may deter predation by numbers alone.

    Known Predators:

    • Australian ravens (Corvus coronoides)
    • Domestic dogs (Canis lupus familiaris)
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Behavior

    Behavior
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    Adult pelicans have few calls and they rarely use them. Their calls include hissing, blowing, groaning, grunting, or bill-clattering. The young are much more vocal than the adults and will loudly beg for food. Australian pelicans primarily communicate with visual cues using their wings, necks, bills, and pouches, especially in courtship displays. Like all birds, Australian pelicans perceive their environment through visual, auditory, tactile, and chemical stimuli.

    Communication Channels: visual ; acoustic

    Perception Channels: visual ; tactile ; acoustic ; chemical

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Life Expectancy

    Life Expectancy
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    Typically pelicans live between 15 and 25 years in the wild. Pelicans can live longer in captivity; the longest-lived captive Australian pelican was 50 years old.

    Range lifespan
    Status: captivity:
    50 (high) years.

    Typical lifespan
    Status: wild:
    15 to 25 years.

    Typical lifespan
    Status: captivity:
    15 to 25 years.

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Reproduction

    Reproduction
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    Australian pelicans breed in large colonies, usually on islands or inland where there are few predators. Pelicans are seasonally monogamous, meaning that every breeding season they pair up with a mate and then stay with that mate for the rest of the season. The following breeding season they may or may not be with the same mate.

    Courtship occurs when the local breeding population gathers at the breeding site. The large group breaks away into smaller groups consisting of a single female and two or more males. Within these smaller groups, males compete against one another for the attention of the female. Females lead the males in her group on courtship walks, swims, and flights, all the while the males display for her. The subordinate males will slowly break away and join other groups. Generally by the end of the ritual, only one male will remain. The pair will then land and begin designating a nesting site.

    While the female pelican sits on the nest site, the male will perform a ritualistic display which may be followed with copulation. In order to mate the male must get on the female's back and then copulation will last from 6 to 22 seconds. They will mate several times over several hours. In between copulations the male will stand next to the female while she starts building the nest. Only after several copulations will the couple begin foraging for nest materials away from the nest.

    Mating System: monogamous

    Breeding usually occurs in winter or early spring, but may occur at any point in the year. Timing of breeding season is dependent upon rainfall and usually after rain events.

    Australian pelicans lay approximately two, 172.9 g eggs per season, but clutch size can vary from 1 to 3. The eggs are elliptical in shape and range from 90 by 59 mm in size. Incubation lasts 32 to 35 days. At the time of hatching birds are altricial, feather-less and with eyes closed. In multi-egg nests, often one chick out-competes the others and is the sole survivor. After chicks leave the nest, they join large groups of up to 100 chicks also known as 'creches'. Chicks remain in these groups until they reach 2 months of age and are able to fly. Chicks do not reach independence for four months after hatching, when the parents stop regular feeding. Juvenile Australian pelicans reach sexual maturity at 3 to 4 years old.

    Breeding interval: Australian pelicans breed once a year.

    Breeding season: Australian pelicans generally breed from winter to early spring, but can occur any time throughout the year.

    Range eggs per season: 1 to 3.

    Range time to hatching: 32 to 35 days.

    Average time to hatching: 32 days.

    Average fledging age: 2 months.

    Average time to independence: 4 months.

    Range age at sexual or reproductive maturity (female): 3 to 4 years.

    Range age at sexual or reproductive maturity (male): 3 to 4 years.

    Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization ; oviparous

    After pairs court and mate they then share the responsibilities of nest building, incubation, and feeding their offspring. During nest building both parents collect materials for the nest. Females will remain at the nesting site collecting nearby materials and forming a ground scrape, while the males will fly away as far as a mile to find materials for the nest.

    After the eggs are laid, both parents share incubation responsibilities. Parents incubate by cradling the eggs on their feet. After hatching both parents alternate hunting for food. After 25 days chicks leave the nest and form creches and parents are able to leave the chicks alone for extended periods of time.

    Australian pelican parents feed their young up to the first four months of the chick’s life. While still in the nest, chicks feed whenever they are hungry. When the chick leaves the nest to join a creche, they will only return to the nest when parents return to feed the chick After feeding, the chick will return to its creche. As the chick gets older the parents will feed their young on the edge of the creche. Once the chick becomes even larger it will leave the creche and join its parents some distance away to be fed.

    Parental Investment: altricial ; male parental care ; female parental care ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Male, Female, Protecting: Male, Female); pre-weaning/fledging (Provisioning: Male, Female, Protecting: Male, Female); pre-independence (Provisioning: Male, Female, Protecting: Male, Female); post-independence association with parents

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Conservation Status

    Conservation Status
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    Australian pelicans are of least concern because they have a very large range, their population trend is fluctuating, and their population size is very large (between 100,000 and 1,000,000 individuals).

    CITES: no special status

    IUCN Red List of Threatened Species: least concern

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Benefits

    Benefits
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    Australian pelicans can be habituated to human activity quite easily. This can be problematic for humans because these pelicans will directly approach humans to be fed or steal from humans because they are opportunistic feeders. This is also problematic because they get caught on fishing lines and hooks, thus disrupting fishermen's catch.

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    bibliographic citation
    Poole, E. 2011. "Pelecanus conspicillatus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Pelecanus_conspicillatus.html
    author
    Elizabeth Poole, Florida State University
    editor
    Emily DuVal, Florida State University
    editor
    Rachelle Sterling, Special Projects
    original
    visit source
    partner site
    Animal Diversity Web
    ID
    Pelecanus_conspicillatus/economic_importance_negative
    Benefits
    provided by Animal Diversity Web

    Pelicans have been symbols of mutual aid and love of fellow human beings. Pelican guano is also used in fertilizer, which can be very beneficial to agricultural economies. Australian pelicans in particular have no significant impact on human beings.

    license
    cc-by-nc-sa-3.0
    copyright
    The Regents of the University of Michigan and its licensors
    bibliographic citation
    Poole, E. 2011. "Pelecanus conspicillatus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Pelecanus_conspicillatus.html
    author
    Elizabeth Poole, Florida State University
    editor
    Emily DuVal, Florida State University
    editor
    Rachelle Sterling, Special Projects
    original
    visit source
    partner site
    Animal Diversity Web
    ID
    Pelecanus_conspicillatus/economic_importance_positive