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| Property | Organism | Value | Units | ID | Details |
|---|---|---|---|---|---|
| Body temperature | Birds | 39-44 | °C | 100924 | Amazing numbers in biology... |
| Half life of antidiuretic hormone | Birds | 6.3 | min | 102419 | Arad Z, Skadhauge E.... |
| 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... |
| Two possible depths of foveal pit | Birds | shallow 80-120 or deep 190-240 | µm | 117189 | Bringmann A. Structure... |
| Approximate λmax values of cone visual pigments, where known, in different bird species | Birds | Table - link | nm | 117175 | Frentiu FD, Briscoe AD.... |
| Most recent date of speciation of herring gull-species | Birds | <10,000 | years ago | 113001 | Hebert PD, Stoeckle MY... |
| 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... |
| 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... |
| Extinction rate | Birds | 132 | extinction/million species/year (E/MSY) | 113446 | Pimm SL et al., The ... |
| Net population change in North American birds | Biosphere | Table - link | % change since 1970 | 117281 | Rosenberg KV et al.,... |
| Divergence between turtles and Archosauria (birds and dinosaurs) | Various | ~255 (274 to 233) | Mya | 108234 | Chiari Y, Cahais V, Galtier N... |
| Time period over which birds and butterflies have evolved | Metazoa animals | birds ~160: butterflies >140 | million years ago | 117177 | Frentiu FD, Briscoe AD.... |
| 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 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 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... |
| Estimated time range of diversification of birds and mammals | Various | 312.3e+6 - 330.4e+6 | years | 105155 | Donoghue PC, Benton MJ.... |
| Time scale of development for various mammals and birds | Various | Table - link | N/A | 102122 | Altman, P.L., and Dittmer... |
| Growth in birds, amphibians, reptiles and fishes: weight at various ages | Various | Table - link | N/A | 102205 | Altman, P.L., and Dittmer... |
| Divergence rate for protein coding mitochondrial DNA in mammals and birds | vertebrates | 0.02 | substitutions/site/Myr | 113217 | Peterson GI, Masel J.... |