[cobirds] Cliff Swallows disappearing

Hi birders,

I live in Superior and have enjoyed watching several largish colonies of Cliff Swallows (dozens of nests) around town for many years. However, starting this year, several of these nesting areas are completely unoccupied even though the mud nests themselves are still largely intact. Has anyone else seen something like this? Any idea what might cause it?

Thanks,

Peter Ruprecht

Superior

--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/CAHPXVBYgSp0b1gTg%2BBkjVhchiMm485rh4anRs--QT5ChzeXM5g%40mail.gmail.com.