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Property Organism Value Units ID Details
Smallest and largest known genomes Birds black-chinned hummingbird (Archilochus alexanderi) 0.91: common ostrich (Struthio camelus) ~1.3 Gb 117104 Zhang G et al., Comparative...
Net population change in North American birds Biosphere Table - link % change since 1970 117281 Rosenberg KV et al.,...
Extinction rate Birds 132 extinction/million species/year (E/MSY) 113446 Pimm SL et al., The ...
Most recent date of speciation of herring gull-species Birds <10,000 years ago 113001 Hebert PD, Stoeckle MY...
Body temperature Birds 39-44 °C 100924 Amazing numbers in biology...
Longest recorded non-stop flight in a bird (Alpine swift, Tachymarptis melba) Birds 200 days 112866 Liechti F, Witvliet W...
Extracellular Fluid Volume (ECV) Birds ducks maintained on fresh water 24.9: ducks maintained on salt water 26.4: gulls 38.2: roosters 28.8 % of body weight 113047 Erik Skadhauge, 1981...
Initiation of sex chromosome evolution Birds >130 Ma (million years ago) 112865 Yazdi HP, Ellegren H....
Fraction of bird species that are polyandrous (one female has a number of male mates) Birds <1 % 113078 David Ward, Do Polyandrous...
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...
Weight span in Ratites Birds kiwi 1kg: ostrich 130kg kg 113077 Dennis M. Power, Current...
Estimated time range of diversification of birds and mammals Various 312.3e+6 - 330.4e+6 years 105155 Donoghue PC, Benton MJ....
Time period over which birds and butterflies have evolved Metazoa animals birds ~160: butterflies >140 million years ago 117177 Frentiu FD, Briscoe AD....
Time scale of development for various mammals and birds Various Table - link N/A 102122 Altman, P.L., and Dittmer...
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...
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....
Number of birds lost to predation by domestic cats in the USA each year according to different sources Biosphere Winkler et al., 80 million birds/year: Walsberg 319 - 638 birds/year 116947 Kevin J. Gaston & Tim...
Ratio between number of species of birds and mammals in tropical regions and temperate regions Biosphere 2 Unitless 103929 May RM. How Many Species...
Divergence between turtles and Archosauria (birds and dinosaurs) Various ~255 (274 to 233) Mya 108234 Chiari Y, Cahais V, Galtier N...
Fraction of land vertebrates including reptiles, birds, and amphibians that are experiencing a decline and losses in local population Biosphere ~30 % 117263 The Lancet Planetary...