Results
Click a row for more details
| Property | Organism | Value | Units | ID | Details |
|---|---|---|---|---|---|
| Number of bird specimens on Earth | Biosphere | 200 - 400 | billion (10^9) birds | 116940 | Kevin J. Gaston & Tim... |
| 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... |
| Initiation of sex chromosome evolution | Birds | >130 | Ma (million years ago) | 112865 | Yazdi HP, Ellegren H.... |
| Number of individual seabirds breeding in Britain | Birds | 6.67e+6 | individual birds | 116944 | Kevin J. Gaston & Tim... |
| 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... |
| 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... |
| 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... |
| 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.... |
| Domestication date | Chicken Gallus gallus | ~8,000 | years ago | 117285 | Bennett CE et al., The... |
| Decrease in bird population size in North America since 1970 | Biosphere | 29 | % | 117279 | Rosenberg KV et al.,... |
| Gains and losses across the North American avifauna over the last half century | Biosphere | Table - link | N/A | 117280 | Rosenberg KV et al.,... |
| 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... |
| 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... |
| Fraction of bird species that are polyandrous (one female has a number of male mates) | Birds | <1 | % | 113078 | David Ward, Do Polyandrous... |
| Speed of fastest animal (peregrine falcon, Falco peregrinus in stoop) | Metazoa animals | >320 | km/hour | 112867 | Ponitz B, Schmitz A,... |
| Estimates for the number of individual birds in different countries with mean density | Birds | Table - link | N/A | 116943 | Kevin J. Gaston & Tim... |
| Longest recorded non-stop flight in a bird (Alpine swift, Tachymarptis melba) | Birds | 200 | days | 112866 | Liechti F, Witvliet W... |
| Fraction of species in breeding avifauna which comprises seabirds | Birds | in Britain 16 %: globaly ~4 | % | 116945 | Kevin J. Gaston & Tim... |