This winter marks the 117th year of a scientific holiday tradition — the National Audubon Society’s annual Christmas Bird Count. Every year beginning on Dec. 14, thousands of birders around the world, organized into local bird-watching “circles,” head out to count and record millions of bird sightings. The count will end Jan.
Christmas Is Bird-counting Season For 60,000 Americans
Ella Koeze, FiveThirtyEight: Science & Health
Wed, 12/21/2016 - 10:16am
Topics: national audubon society s dec jan u.s count yearcountnumber of circlesnumber of counters1909-1010th1171831919-2020th1473191929-3030th1856051939-4040th2581,8011949-5050th3924,3991959-6060th5577,4751969-7070th82113,0491979-8080th1,18029,9201989-9090th1,37730,3971999-2000100th1,56842,2822009-10110th1,73548,0452015-16116th1,90258,493the u.s national audubon societyand u.s common namecountred-winged u.s national audubon societybut u.s u.s but u.s partners flight u.s common namenumber of times in top 15american u.s source national audubon societythe u.s laysan alaska hawaii kathy dale u.s it audubon society audubon society national audubon society christmas bird count u.s the flight american blackbird million birds years sightings birders science population holiday thousands robin conservation feral estimate data people change species pigeon list approved citizen participants
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