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Property Organism Value Units ID Details
Half life of DNA in bones Extinct New Zealand moa 521 years 108267 Morten E. Allentoft et al....
Population size (most numerous undomesticated bird on earth) Red-billed quelea Quelea quelea ~1.5 billion individuals 117284 Bennett CE et al., The...
Number of bird species that became extinct in tropical oceania islands in approximately 2000 years, since human colonization Biosphere 1800 bird species 117273 Khan S et al., Overview...
Domestication date Chicken Gallus gallus ~8,000 years ago 117285 Bennett CE et al., The...
Estimated time range of diversification of birds and mammals Various 312.3e+6 - 330.4e+6 years 105155 Donoghue PC, Benton MJ....
Number of individual seabirds breeding in Britain Birds 6.67e+6 individual birds 116944 Kevin J. Gaston & Tim...
Estimates for the number of individual birds in different countries with mean density Birds Table - link N/A 116943 Kevin J. Gaston & Tim...
Reproduction cost for female in Charadriiformes Birds clutch may weigh ≤80-90% of female body mass: consume 200% of her calcium unitless 113079 David Ward, Do Polyandrous...
Estimates for the number of individual birds in Africa and the Nearctic with mean density Birds Table - link N/A 116950 Kevin J. Gaston & Tim...
Number of bird specimens on Earth Biosphere 200 - 400 billion (10^9) birds 116940 Kevin J. Gaston & Tim...
Decrease in bird population size in North America since 1970 Biosphere 29 % 117279 Rosenberg KV et al.,...
Sketches of red blood cells taken from various vertebrate species vertebrates Figure link - link N/A 108664 Goehring NW, Hyman AA....
Number of birds lost to predation by domestic cats each year Biosphere in Britain ≥20 million birds/year: in USA >80 million birds/year 116948 Winkler, K., Fall, B.A....
Fraction of species in breeding avifauna which comprises seabirds Birds in Britain 16 %: globaly ~4 % 116945 Kevin J. Gaston & Tim...
Number of migratory birds lost to hunting and trapping in the Mediterranean countries each year Biosphere 1e+9 birds/year 116946 Kevin J. Gaston & Tim...
Longest recorded non-stop flight in a bird (Alpine swift, Tachymarptis melba) Birds 200 days 112866 Liechti F, Witvliet W...
Speed of fastest animal (peregrine falcon, Falco peregrinus in stoop) Metazoa animals >320 km/hour 112867 Ponitz B, Schmitz A,...
Initiation of sex chromosome evolution Birds >130 Ma (million years ago) 112865 Yazdi HP, Ellegren H....
Estimates of the local density of individual birds (number/km^2) of all species at seven forest sites on five continents Birds Table - link individuals/km^2 116942 Kevin J. Gaston & Tim...
Gains and losses across the North American avifauna over the last half century Biosphere Table - link N/A 117280 Rosenberg KV et al.,...