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The average global population of all mature birds is estimated to be on the order of 100 billion individuals. [1] [2] [3] The total population including younglings is somewhat higher during the breeding season of each species. [3] This list is incomplete, because experts have not estimated all bird numbers.
In total there are about 10,000 species of birds described worldwide, though one estimate of the real number places it at almost twice that. [1] The order passerines (perching birds) alone accounts for well over 5,000 species.
In 2011 a study published in PLoS Biology estimated there to be 8.7 million ± 1.3 million eukaryotic species on Earth. [11] By 2017, most estimates projected there to be around 11 million species or fewer on Earth. [4] A 2017 study estimated there are around at least 1 to 6 billion species, 70-90% of which are bacteria. [4]
Due to a declining population, experts from the International Union for Conservation of Nature (IUCN) included the bird on its Endangered Species There are Less Than 1,000 of These Birds Left in ...
As of May 12, 2021, there were over one billion bird observations recorded through this global database. [9] In recent years, there have been over 100 million bird observations recorded each year. [10] eBird's goal is to maximize the utility and accessibility of the vast numbers of bird observations made each year by recreational and ...
The goal of the project was to produce an illustrated guide to all of the birds of the world; its first iteration was in the 17-volume Handbook of the Birds of the World, published by Lynx Edicions over the course of 22 years, from 1992 to 2014.
The worldwide bird group will begin renaming birds that are named after people, starting with 70-80 in the US and Canada. Worldwide group will begin renaming birds, including these 10 from NC ...
It is infecting wild bird populations across the globe and could potentially infect endangered species.