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英文字典中文字典相关资料:


  • RSPB Big Garden Birdwatch: Charity asks people to help
    For the last 42 years the RSPB has been monitoring the UK birdlife population by asking members of the public to count the birds in their gardens
  • Bird Collections: Development and Use of a Scientific Resource
    Today, there are more professional ornithologists than at any time in history, and collections-related research represents only a small portion of the discipline This is healthy Collections are but one means through which we study birds But we cannot be lulled into a view that the day of the collection is past-a decided risk when fewer
  • Number of species threatened with extinction - Our World in Data
    Countries with more than 25 species at risk of losing more than 25% of their habitat by 2050; Cumulative first records of alien species; Day of the year with peak cherry tree blossom in Kyoto, Japan; Drivers of recovery in European bird populations; Endemic amphibian species; Endemic bird species; Endemic freshwater crab species; Endemic mammal
  • Which bird species have gone extinct? A novel quantitative . . .
    The six approaches considered for determining which species should be listed as Critically Endangered (Possibly Extinct) and which as Extinct: (a) method 1: any species for which both P(extant based on records and surveys) and P(extant based on threats) were less than a threshold value; (b) method 2: any species for which either P(extant based
  • Phylogeny and diversification of the largest avian radiation
    Major lineages of the ≈5,739 species of passerine birds have diversified on all continents and now occupy nearly all terrestrial ecosystems The songbirds (oscines, suborder Passeri) alone comprise nearly half of all extant avian species and represent the largest identifiable radiation of birds (), encompassing a staggering ecological and behavioral diversity
  • Orders of Birds – IOC World Bird List
    A higher classification of modern birds (June 28, 2019) Improving sets of DNA sequences are revolutionizing the Avian Tree of Life and call for substantial revisions of the higher classification of birds, especially the sequence of the Orders (Hackett et al 2008; Cracraft 2013; Jarvis et al 2014; Prum et al 2015; Suh et al 2015; Kuhl et al 2020)
  • Hummingbird - Wikipedia
    As calculated by displacement of body size, the rufous hummingbird makes perhaps the longest migratory journey of any bird in the world At just over 3 inches (7 6 cm) long, rufous hummingbirds travel 3,900 miles (6,300 km) one-way from Alaska to Mexico in late summer, a distance equal to 78,470,000 body lengths, then make the return journey in





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