[cobirds] Sedge Wren Arapahoe county

[Cole Sage]

Hi all,

There is a Sedge Wren at Cherry Creek State Park. Seen on both sides of the
trail. 39.6224750, -104.8311608


Cole Sage and Luke Pheneger

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[cobirds] Loon Trio at Marston Reservoir, Denver County, 11/10

[mille...@gmail.com]

Good morning everyone,

I saw reports from Norm Lewis on eBird last night that there were two 
*Yellow-billed 
Loons* present at Marston, so since I had some time free this morning I 
figured I'd chase what would be a lifer for me.

I started out on the west side, where I immediately found the female *Black 
Scoter* that has been reported recently. Another great bird, and the best 
views of one I've had to date. I counted three loons from here, but they 
were fairly distant and very backlit, so I moved on quickly to Isthmus Park.

On arrival there, I heard the iconic call of a *Common Loon* - seemingly 
from the eastern side of the reservoir, though I never did get it scoped 
up. Consequently, it occurs to me that though I've observed this bird in 
other places in Colorado, Marston is the only place I've ever heard them 
calling. I don't know if it's coincidental, whether they call more at 
Marston, or if there's something about Marston that makes them more readily 
heard, in any case I love hearing *the* sound of the Great North Woods 
right here in my own backyard.

Getting back to the story at hand, I quickly scoped up two of the loons I 
had spotted from the west hugging the riprap on the northern shore of the 
reservoir. From this angle they were very brightly lit, but they seemed 
good for Yellow-billed just from the reports, and the fact that their bills 
seemed very strongly pale. Combing the reservoir for the third loon, I 
found a smaller, more slender bird with a very white throat and face. This 
one was closer and provided better views than the other two, and it wasn't 
long before I realized I was looking at a *Red-throated Loon*, another 
"good" loon for this area, and one I have had some experience with before. 
This bird remained generally associated with the white and orange buoys in 
the middle of the reservoir while I was observing.

Not satisfied with my views of the Yellow-billeds, I kept combing the 
reservoir, and they kept moving west - so far that it dawned on me that I 
might be able to get a stronger diagnostic look from where I started. So I 
made my way back over where I crossed paths with Ray Sperger. After 
observing the Black Scoter with him again, we found the loons but they were 
still too distant and backlit for confident ID. Ray suggested a spot near 
where the *Bald Eagles* are known to nest on the north shore as a potential 
place to observe from, so we headed over there.

And a good thing, too! Long story short, thanks to the ability to elevate 
ourselves in the bed of Ray's pickup, as well as his previous experience 
with the bird, we were able to get close (if still backlit) looks at the 
birds, good enough to clearly see the heavy bills with the upturned 
appearance due to the angled lower mandible. As an added bonus, we got some 
great looks in of the Bald Eagles working on their nest, as well as chasing 
a third rival eagle away from the area!

Many thanks to Norm for the initial report, and to Ray for his help getting 
back on these birds. It was a great morning chase before I get started on 
seemingly never-ending day-off housework and chores :D

Good birding!

Max Miller
Lakewood, CO

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[cobirds] Mew Gull Arapahoe

[Luke Pheneger]

There’s an adult Mew Gull at Pelican Point at Cherry Creek SP

Luke Pheneger

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[cobirds] eBird species trend maps!

[Curt Brown --- Boulder, CO]

Cornell eBird is just releasing species maps showing trends in abundance 
from 2007 to 2021.  Wonderful consolidation of zillions of observations. 

I pulled up the map for Blue-gray Gnatcatcher.

https://science.ebird.org/en/status-and-trends/species/buggna/trends-map?utm_source=Cornell%20Lab%20eNews_campaign=612a9e57e2-Cornell-Lab-eNews-November-2022_medium=email_term=0_47588b5758-612a9e57e2-306045397

This map tracks my experience of a significant decline in abundance along 
the Front Range.  It would appear that we are on the western edge of a 
broad  decline in abundance in the eastern US, whereas almost the entire 
West is showing increases.  

If nothing else, these  maps will fuel a lot of discussion and arm-chair 
theorizing.  

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[cobirds] Bird Conservancy of the Rockies Presents: Black Swift Movement Ecology Webinar

[Tyler Cash]

Hey CO birders,

Join us next Thursday, November 17th from 5 p.m. - 6 p.m. for a 
presentation about Black Swift Movement Ecology presented by Rob Sparks. 
See below for details and how to register!

--

The Black Swift is an aerial insectivore that has evolved an almost 
exclusive lifestyle on the wing. This species is of continental concern, 
but little is known about its movement ecology. We recently discovered a 
new behavior, an amazing adaptation to moon light and gained insight into 
their foraging patterns during the breeding season.

Tune into this webinar to learn what the Black Swift research team has 
learned from the Black Swift Movement Ecology project. This webinar is 
presented by Rob Sparks the Black Swift Research team lead at Bird 
Conservancy of the Rockies.

The program fee is $3 to attend this webinar.

In order to provide equitable access to all, complimentary tickets are 
available at no cost to the participant thanks to support from generous 
donors.

Follow this* LINK 

 *to 
register!

After registering you will receive a confirmation email containing the ZOOM 
link to be used the day of the webinar.

Cheers,

Tyler Cash

Digital Engagement Manager

Bird Conservancy of the Rockies

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