|
Region:
|
Jump to :
| View
All Lists | FAQ
|
|
|
Date: 10/4/25 3:13 pm
From: Larry Schwitters via Tweeters <tweeters...>
Subject: [Tweeters] Vauxs Happening |
Heres kind of a chart showing how many NA Vaux’s Swift roost entries our project documented each year durning their Southbound migration.
2008 348,501
2009 538,940
2010 609,860
2011 944,183
2012 1,079,190
2013 964,937
2014 1,145,468
2015 1,049,759
2016 1,139,987
2017 1,248,587
2018 1,544,242
2019 1,353,712
2020 1,197,318
2021 1,576,944
2022 1,671,983
2023 2,206,103
2024 2,045,652
2025 1,874,637 as of 10/3. 50,000 + roosted near San Quentin last night.
This looks like the species has been having a major population increase. Numbers from the Northbound
migrations suggest otherwise.
Larry Schwitters Issaquah
_______________________________________________
Tweeters mailing list
<Tweeters...>
http://mailman11.u.washington.edu/mailman/listinfo/tweeters
|
| |
|
 |
Join us on Facebook! |
|
