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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.
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.
Given the 50,000 described tropical tree species, Erwin suggested that there are almost 10 million beetle species in the tropics. [27] 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 ...
There are over 11,000 living species ... Many birds show plumage patterns in ... Many bird species migrate to take advantage of global differences of ...
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 ...
TOP 20 Global Biodiversity Index [3]; Country (or dependent territory) Bird Amphibian Fish Mammal Reptile Vascular Plant Biodiversity Index Brazil 1,816: 1,141: 4,738
Pages in category "Lists of birds by continent" The following 8 pages are in this category, out of 8 total. This list may not reflect recent changes. A.