Saturday, 28 February 2009

Canon City Rock Wren

Though I don't know of any relationship to the previous post about birds wintering further north related to Climate Disruption (better term than Global Warming or Climate Change), Canon City has had wintering Rock Wrens at Tunnel Drive for some years. This is noted in "Colorado Birds" that was published in 1992. And it has been my experience at least for the past 10 years. This pic is one I took of a Rock Wren I found at Tunnel Drive. Double-click on it for a nice close-up.

Tunnel Drive is an area right at the mouth of the Royal Gorge canyon just on the west side of Canon City. The Arkansas River flows just south of the location while the foothills begin here. This area also is the site for Rufous-crowned Sparrows that are resident here. This species is usually found in the southwest United States and only found in 3 other Colorado locations, all in southeast Colorado over a hundred miles from here. SeEtta

Birds wintering further north-Audubon study

National Audubon Society released a report recently that showed that many birds in North America are wintering much further north than they used to. They used Christmas Bird Count data to look at where birds have been found over the a 40 year period. This graph from Associated Press shows some of the species that have been found wintering further north and the distance north. ©AssociatedPress

National Audubon researchers then obtained information from NOAA on the average temperature increase in the United States. The graph of these average temperature increases parallels the graph of the increases of birds wintering further north. Read more on this research at National Audubon Society webpage. SeEtta

Another nesting owl

I found this female on this nest 2 weeks ago. She is one of the pair of Great Horned Owls I heard engaged in duetting in early December. Interestingly, she (her voice clearly higher pitched than the male) was perched on this same nest while she sang. The male sang from a branch of a cottonwood about 50 feet away. SeEtta

Friday, 27 February 2009

Great Horned Owls nesting in Colo

Female Great Horned Owls are "on the nest" all around eastern Colorado. I have been owling around south central Colorado for about a month and have found 2 Great Horned Owls on nests including the one in this photo that is sleeping or at least resting with her eyes mostly closed. Double click on the pic for a close-up which reveals her left eye slightly open, evidently aware of my presence though I always try to be as quiet as possible (the darn digital cameras make noise when the shutter is snapped that is clearly noticed by some birds). This is the type of impact that is often unseen or ignored by birders and especially bird photographers.
Not only I but other Colorado birders have reported owls on nests for the past few weeks.Besides the 2 on nests, I have seen 3 other Great Horned Owls in 2 counties. I also spotted a Western Screech Owl.

Great Horned have been singing since December. In fact, I heard a pair engaged in duetting in early December (seemed a little early) and the I found the female on the nest 2 weeks ago. Duetting is when a pair sings songs that overlap or are sometimes even synchronized. SeEtta

FAA Agrees to Study Lighting Requirements for Bird-Killing Towers

I am delighted that the Federation Aviation Administration is going to do this study:

>>The Federal Aviation Administration (FAA) has announced plans to conduct a study that will examine whether steady-burning sidelights on tall communications towers, which attract birds and cause them to collide with the towers during night migration, can be safely eliminated without endangering air traffic. Unlike many waterfowl and birds of prey, most songbirds migrate during the night, with up to several billion birds having to navigate a landscape littered with as many as 100,000 lighted towers each spring and fall. American Bird Conservancy and its conservation partners have been working together with the communications industry in seeking this important study, which will help determine whether the safety of pilots can be maintained while also reducing the impact of lights on migrating birds.<<

Read more. SeEtta

Sunday, 22 February 2009

Yellow-bellied Sapsucker still in Canon City


I had some software and other problems, so haven't posted for a while. Though the Canon City area, as well as most of eastern Colorado has been in a "abnormally dry" (per weather service, I think it's part of continuing drought cycle)period for months which has impacted a number of birds, at least one Yellow-bellied Sapsucker is still here. Actually I saw 2 days ago after trying several times unsuccessfully. This female is exceptionally skittish.

In this pic, the red crown is barely visible but the facial lines are very clear. If you look close there is a drop of sap on the tip of her bill. Also some sap wells,some dripping sap, she has made are also barely visible. SeEtta