Re: [cobirds] Re: House Wrens increasing

Could this increase in wrens in the foothills and plains be due to the cool and very rainy May?  It was just cool down here but cold above 8500'. 

We had our first nesting wren in my neighborhood in Louisville in 11 years. 

Wrens were much scarcer on my Indian Peaks bird count this year. The totals will be interesting. 

Paula Hansley

Sent from my iPhone

On Jul 16, 2015, at 11:33 AM, Comcast <gmluger@comcast.net> wrote:

We live in the foothills above FoCo @6,000ft. We have more Wrens (by sight or song) in our surrounding area than we have had in our 35+ years of living out here. (Purely anecdotal.) The competition must be fierce.

Since the raid on the nest at our place, the house remains unoccupied. I hope we attract a new couple soon. 

Interesting COBird observations. Thank you all for sharing your expertise.

The Lugers

Across from Horsetooth Mtn. Pk.

On Jul 15, 2015, at 10:48 AM, Janis Robinson <janisalana.robinson@gmail.com> wrote:

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 

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