View Single Post
Old Wednesday 30th October 2019, 06:19   #2
fugl
Registered User
BF Supporter 2020

 
Join Date: Feb 2003
Location: Portland, Oregon
Posts: 15,211
No, they in no way impede migration. And in the temperate parts of North America, at least, where most of the local cavity roosters are resident year round, I doubt if nest boxes see any significant use by migrants.
__________________
Bird photos (Flickr): http://www.flickr.com/photos/fugl/
". . .Let them be left, O let them be left, wildness and wet;
Long live the weeds and the wilderness yet."

--Gerard Manley Hopkins

Last edited by fugl : Wednesday 30th October 2019 at 06:24.
fugl is offline  
Reply With Quote

BF Supporter 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Support BirdForum With A Donation