[Tweeters] Vauxs Happening

[Larry Schwitters via Tweeters]

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