![]() in a volume bounded by that area up to the highest altitude birds are detected) at the time specified in the local time zone for the selected area. This is an estimate of the total number of birds aloft in an area (i.e. “Historical” mode, visible for all time and date selections after the actual migration night. Type in the county or state of your choice in the contiguous United States, select a date during migration seasons in 2021 or 2022, and begin! If you are new to BirdCast, get acquainted with the basics: How to use the BirdCast Migration Dashboard to experience your local migration in detail. ![]() This tool presents a number of different measures of bird migration, and the descriptions below provide some basic information and guidance for interpreting these appropriately. As your explorations begin, discovering interesting, new and previously unknown patterns will be, perhaps, the most exciting aspects of the new tool! Note that the dashboard currently provides data for counties and states in the contiguous US, complementing our existing forecast and live migration maps but allowing you to explore nocturnal bird migration in ways that were previously impossible. This tool depicts migration patterns in near real time or as a summary of a whole night after nocturnal periods end (2021-present) this includes additional historical information (2013-2021) as well as previous nights’ movements. The new BirdCast Migration Dashboard provides summaries of radar-based measurements of nocturnal bird migration, including estimates of the total number of birds migrating, their directions, speeds, and altitudes.
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