<P> The eight living pelican species were traditionally divided into two groups, one containing four ground - nesters with mainly white adult plumage (Australian, Dalmatian, great white, and American white pelicans), and one containing four grey - or brown - plumaged species which nest preferentially either in trees (pink - backed, spot - billed and brown pelicans), or on sea rocks (Peruvian pelican). The largely marine brown and Peruvian pelicans, formerly considered conspecific, are sometimes separated from the others by placement in the subgenus Leptopelicanus but in fact species with both sorts of appearance and nesting behavior are found in either . </P> <P> DNA sequencing of both mitochondrial and nuclear genes yielded quite different relationships; the three New World pelicans formed one lineage, with the American white pelican sister to the two brown pelicans, and the five Old World species the other . The Dalmatian, pink - backed, and spot - billed were all closely related to one another, while the Australian white pelican was their next - closest relative . The great white pelican also belonged to this lineage, but was the first to diverge from the common ancestor of the other four species . This finding suggests that pelicans evolved in the Old World and spread into the Americas, and that preference for tree - or ground - nesting is more related to size than genetics . </P> <Table> <Tr> <Th_colspan="4"> Living species of Pelecanus </Th> </Tr> <Tr> <Th> Common and binomial names </Th> <Th> Image </Th> <Th> Description </Th> <Th> Range and status </Th> </Tr> <Tr> <Td> American white pelican Pelecanus erythrorhynchos Gmelin, 1789 </Td> <Td> </Td> <Td> Length 1.3--1.8 m (4.3--5.9 ft), wingspan 2.44--2.9 m (8.0--9.5 ft), weight 5--9 kg (10--20 lb). Plumage almost entirely white, except for black primary and secondary remiges only visible in flight . </Td> <Td> Monotypic . Inland North America, wintering in Mexico . Status: Least Concern . </Td> </Tr> <Tr> <Td> Brown pelican Pelecanus occidentalis Linnaeus, 1766 </Td> <Td> </Td> <Td> Length up to 1.4 m (4.6 ft), wingspan 2--2.3 m (6.6--7.5 ft), weight 3.6--4.5 kg (7.9--9.9 lb). Smallest pelican; distinguished by brown plumage; feeds by plunge - diving . </Td> <Td> Five subspecies . Coastal distribution ranging from North America and the Caribbean to northern South America and the Galapagos . Status: Least Concern . </Td> </Tr> <Tr> <Td> Peruvian pelican Pelecanus thagus Molina, 1782 </Td> <Td> </Td> <Td> Length up to 1.52 m (5.0 ft), wingspan 2.48 m (8.1 ft), average weight 7 kg (15 lb). Dark with a white stripe from the crown down the sides of the neck . </Td> <Td> Monotypic . Pacific Coast of South America from Ecuador and Peru south through to southern Chile . Status: Near Threatened . </Td> </Tr> <Tr> <Td> Great white pelican Pelecanus onocrotalus Linnaeus, 1758 </Td> <Td> </Td> <Td> Length 1.40--1.75 m (4.6--5.7 ft), wingspan 2.45--2.95 m (8.0--9.7 ft), weight 10--11 kg (22--24 lb). Plumage white, with pink facial patch and legs . </Td> <Td> Monotypic . Patchy distribution from eastern Mediterranean east to Indochina and Malay Peninsula, and south to South Africa . Status: Least Concern . </Td> </Tr> <Tr> <Td> Australian pelican Pelecanus conspicillatus Temminck, 1824 </Td> <Td> </Td> <Td> Length 1.60--1.90 m (5.2--6.2 ft), wingspan 2.5--3.4 m (8.2--11.2 ft), weight 4--8.2 kg (8.8--18.1 lb). Predominantly white with black along primaries and very large, pale pink bill . </Td> <Td> Monotypic . Australia and New Guinea; vagrant to New Zealand, Solomons, Bismarck Archipelago, Fiji and Wallacea . Status: Least Concern . </Td> </Tr> <Tr> <Td> Pink - backed pelican Pelecanus rufescens Gmelin, 1789 </Td> <Td> </Td> <Td> Length 1.25--1.32 m (4.1--4.3 ft), wingspan 2.65--2.9 m (8.7--9.5 ft), weight 3.9--7 kg (8.6--15.4 lb). Grey and white plumage, occasionally pinkish on the back, with a yellow upper mandible and grey pouch . </Td> <Td> Monotypic . Africa, Seychelles and southwestern Arabia; extinct in Madagascar . Status: Least Concern . </Td> </Tr> <Tr> <Td> Dalmatian pelican Pelecanus crispus Bruch, 1832 </Td> <Td> </Td> <Td> Length 1.60--1.80 m (5.2--5.9 ft), wingspan 2.70--3.20 m (8.9--10.5 ft), weight 10--12 kg (22--26 lb). Largest pelican; differs from great white pelican in having curly nape feathers, grey legs and greyish - white plumage . </Td> <Td> Monotypic . South - eastern Europe to India and China . Status: Near Threatened . </Td> </Tr> <Tr> <Td> Spot - billed pelican Pelecanus philippensis Gmelin, 1789 </Td> <Td> </Td> <Td> Length 1.27--1.52 m (4.2--5.0 ft), wingspan 2.5 m (8.2 ft), weight c. 5 kg (11 lb). Mainly grey - white all over, with a grey hindneck crest in breeding season, pinkish rump and spotted bill pouch . </Td> <Td> Monotypic . Southern Asia from southern Pakistan across India east to Indonesia; extinct in the Philippines and possibly eastern China . Status: Near Threatened . </Td> </Tr> </Table> <Tr> <Th_colspan="4"> Living species of Pelecanus </Th> </Tr>

What is the average weight of a pelican
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