I live in Coal Creek Canyon between Boulder and Golden at 8000 ft. We have a LOT of wrens up here this spring and summer -- they were infrequent before. I put up some nest boxes and had 2 successful batches of fledglings in one of the boxes.
Janis Robinson Coal Creek Canyon On Tuesday, July 14, 2015 at 4:42:08 PM UTC-6, Robert Righter wrote: > > Hi all > > The House Wren has always been an infrequent spring and fall migrant in > our neighborhood in Denver. Last summer a few House Wrens were noted in our > backyard. This summer the House Wren has blanketed not only our backyard > but the whole neighborhood’s backyards, to where the wren the now is the > most common breeding bird species. > > It is curious what environmental factors have triggered this increase. We > rightfully take note of birds decreasing in populations but rarely take > note of bird population increasing, except those that are considered pest > species. > > Could there could be common environmental reasons for populations both > increasing and decreasing? Perhaps knowing the reasons why some birds are > increasing could help explain why some birds are decreasing? > > Bob Righter > Denver CO > -- 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 [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/1663b9bc-87a2-4f97-9670-0519b8cce9ee%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
