[cobirds] Gregory Canyon Western Fly

[Steven Mlodinow]

Greetings Nathan,


Thanks for putting in the work to record this bird. Cell phone dead yesterday, 
and due to alimentary ailments unable to do much of anything today.
My memory (here is where the brain does weird things to what you hear and see) 
had this bird's call note as more bipartite, though not so much as a 
Cordilleran.
NONETHELESS, I am certain that you recorded the bird I heard, alas. At least it 
is one less write up for the CBRC :o)


I do have one request: in the second portion of your discussion, the only 
PacSlope is one from Arizona. I would be interested to see what the sonogram 
(?) of a male position note form w. WA or w. OR look like. Though AZ is not 
truly "out of range" for Pac Slope, it would be nice to see a sonogram from the 
extreme edge (away from Cordilleran) of the PacSlope range, where one can be 
pretty certain there is no gene mixing.


Finally, in reality, the bird sounds more like a PacSlope, but atypical for 
either taxon, and usually in such cases the correct ID is that of the commoner 
bird.


Thanks for your work on this, once again
Steve Mlodinow
Longmont, CO



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[cobirds] Cockatiel - Belmar Park - Jeffco

[Ira Sanders]

Birders,

This a.m. at Belmar Park in Lakewood, there was a Cockatiel in the willows
at the east end of the slough.  Anybody know anyone that has lost one?  

 

Ira Sanders

Golden CO

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[cobirds] Broad-winged Hawk - Jeffco

[Ira Sanders]

Birders,

The Broad-winged Hawk continues at Welchester Tree Park in Lakewood as of
this morning, June 13.

 

Ira Sanders

Golden, CO

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[cobirds] Strange Oriole - Louviers - Dougco

[Ira Sanders]

Birders,

On Saturday, June 11, Tom Halverstadt lead a group into a presently closed
area of the DuPont Property in Louviers that may soon be open as Dougco Open
Space.  We were looking for Yellow-billed Cuckoo that he had seen there
fairly regularly as of late.  We found them and are pretty sure they will
nest as copulation was observed.  

Now, on to the oriole.

We found an oriole singing that sounded to me to be somewhere between an
Orchard and a Baltimore.  To me it was more like a Baltimore.  The head was
turning black but the upper breast was barely tinged with the brick red of
an Orchard but the lower breast and belly looked yellowish orange.  When it
flew the rump was the greenish of an Orchard.  The pictures I got are not
clear as to whether or not it has wing bars or shoulder marks.

I have some poor pictures of it if anyone wants to take a shot at it.

 

Ira Sanders

Golden, CO

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[cobirds] late CFO and MI bird photos

[Kayleen A Niyo]

Sorry to be so late with a few photos of another great CFO convention in
Grand Junction.  Thanks to all who made it possible, and even brought out
the sun for the final days!

 

I just returned from visiting family in MI where we birded Kensington
Metropark near Ann Arbor, thanks to a tip from Tom and Barb Wilberding,
Boulder birders, who told me the chickadees would eat out of our hands!  ALL
the birds wanted to eat out of our hands including a Greater Sandhill Crane
family of two adults and two young colts!  The adult male ate out of Tracy's
hand!  Amazing photos obtained!  I read that they first nested there in
2002.  So, if you are in that area of MI, stop there!

 

http://www.kayniyo.com/trip_CFO_11.htm

 

http://www.kayniyo.com/trip_MI_May_11.htm

 

Kay

Kayleen A. Niyo, Ph.D.
Niyo Scientific Communications
Kay Niyo Photography
  k...@kayniyo.com

  www.KayNiyo.com
__
5651 Garnet Street
Golden, CO 80403
Phone: (303) 679-6646
Fax: (866) 849-8013 

 

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[cobirds] Boulder Birds

[David Waltman]

There were two Snowy Egrets at Clover Basin Reservoir this afternoon, as well 
as three Great Egrets. eBird shows only one other June record for Snowy Egret 
in Boulder County, although there are several July records. There were American 
Dippers at Boulder Creek and 75th again this morning, which others have 
reported. An adult was feeding a juvenile. This location is unusually low and 
distant from the foothills for them in Boulder County in the summer. 
David Waltman 
Boulder 

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[cobirds] Black-chinned Sparrows - Mesa County - Sat 6/11

[Chip Clouse]

CObirders,
Sorry for the late report but I did have two singing Black-chinned Sparrows
at Colorado National Monument on Saturday. Both were in the vicinity of the
Devil's Kitchen and No Thoroughfare Canyon trails confluence with the first
about 400 meters up and the second only about 50 meters up the No
Thoroughfare trail.  In my short visit there (non-birding companion in tow)
I also had Turkey Vulture, White-throated Swift, Black-chinned Hummingbird,
Ash-throated Flycatcher, Common Raven, Rock Wren, Blue-gray Gnatcatcher,
Black-throated Sparrow,  and House Finch.  There was a single male Gambel's
Quail just before the park entrance.  After reading of Jason's Friday
sightings, I wish I would have continued further up the trail for the vireo,
warbler, titmouse, and jay - but alas, wine tasting was my compromise for
chasing my lifer Black-chinned Sparrow.

Good birding,

Chip Clouse
Colorado Springs

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[cobirds] Gregory Canyon flycatcher, 6/13

[Nathan Pieplow]

I rose early this morning to try to get recordings of the possible
Pacific-slope Flycatcher in Gregory Canyon.  I was hoping to get recordings
of both the dawn song and the position note, and I thought I did, but upon
examining the spectrograms of my recordings, it became clear that the bird
singing the dawn song and the bird giving the position note were different
individuals. Thus, I do not believe that I heard dawn song from the
"interesting" bird this morning.  However, I believe it can still be
identified as a Cordilleran given the shape of its position note.

I have posted a fairly extensive discussion of the identification problem on
my blog at http://earbirding.com/blog/archives/2996.  It includes
spectrograms and audio of the Gregory Canyon bird, as well as the position
notes and dawn songs of typical (and some atypical) Pacific-slope and
Cordilleran Flycatchers.

Many thanks to Steve Mlodinow for his sharp ears and his conscientious
reporting.  The bird does indeed sound like a Pacific-slope -- in fact,
while I have frequently heard a few Pacific-slope-like call notes from
Cordillerans in Colorado over the years, this is the first bird I've heard
that seems to give the Pacific-slope-like variant almost *all *the time.
Ultimately, I think this bird provides strong evidence that Cordilleran and
Pacific-slope Flycatchers are probably not separable with confidence in the
field, even by ear -- although spectrograms should do the trick.

Nathan Pieplow
Boulder

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[cobirds] State Park rates

[Tom Wilberding]

Edie Israel asked that I let COBirders know that the Colorado state
park lifetime pass for those 64 or older, the Aspen Leaf Pass, is
going up from $175 to $300 effective July 1, 2011. So here is a chance
for a bargain, seniors.
http://www.parks.state.co.us/SiteCollectionImages/parks/Misc/SeniorDiscountHandout_Web.pdf

Tom Wilberding
Boulder, CO

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[cobirds] Northern Parula singing in Pueblo 6/12 & 6/13

[Brandon K. Percival]

Van Truan heard a parula species singing yesterday (6/12) late afternoon inside 
the Pueblo Zoo in Pueblo.  Since he wasn't able to see it, I thought it would 
be a good idea for me to go look for it this morning (hoping that maybe it 
would a Tropical Parula and not a Northern Parula, since I haven't seen one in 
Colorado).  My hopes faded quickly, when I saw the bird this morning (6/13), in 
Pueblo City Park, near the Zoo, it was a Northern Parula.  I think it is a good 
idea to try to see any summer time Parula singing in Colorado, as maybe another 
Tropical Parula might show up some day (though I'll probably not see it, just 
like the first one).

Another interesting thing, were two calling Red-breasted Nuthatches at Pueblo 
City Park this morning.  Kind of odd to have them in Pueblo in the summer, 
wonder if they breed in City Park.
 

Brandon Percival
Pueblo West, CO

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[cobirds] Western Gull roosting near South Platte inflow, sunset 12 June 2011

[Gmail]

Hello CO-BIRDS,

Liz and I, at long last, found some time to head up to Chatfield Reservoir and 
search for the Western Gull. With the usual wall to wall weekend 
recreationists, it took us a couple of hours and two visits (before and after a 
great dinner at the Damascus Grill in Littleton), but we at last found the bird 
around 8 PM, just as the sun was nearing the Front Range. The gull looked as if 
it had every intention of spending the night right where it was, lying on a 
tractor or truck tire just NE of where the South Platte enters the reservoir 
(which I believe put it in Douglas County, but only by a rictal bristle).

There may well have been a closer and less obstructed vantage point, but we 
spotted it from the overlook deck just W (and very slightly N) of the Heronry 
picnic area. That overlook can be recognized by a lone pine tree that stands 
just in front of it and an interpretive sign entitled, "The South Platte River: 
A History of Change." We had to stand on the SW corner of the viewing platform 
there and look S. Even then, our view was a bit obscured by tree branches. I 
snapped a couple of pictures through the scope with my iPhone, one of which I 
posted to my Facebook wall: http://on.fb.me/mGFl87

I'd like to add our voices to the chorus of congratulations to Glenn and of 
thanks to him and the many others who have kept tabs on this remarkable bird.

Good birding,

Jeff

Jeffrey Gordon
President
American Birding Association
Colorado Springs, CO
jgor...@aba.org






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[cobirds] More Cassin's Sparrow/Nunn

[The "Nunn Guy"]

Three Cassin's Sparrow singing in SE and NE fields of WCR 100/33 near
our house this morning.  The other spots to check are WCR 102/33 go
east about .5 miles to Rabbitbrush collection on north.  Also, along
WCR 37 and WCR 41 north of WCR 100 are "usual" areas they can be found
singing.  Grasshopper Sparrow are usually sining right alongside these
guys, too.

American Kestrel (our nestbox in Nunn) fledgling update--I think there
are five.  They are pretty entertaining to watch.

Thanks Gary Lefko, Nunn
http://coloradobirder.ning.com/

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[cobirds] Ovenbirds - Jefferson County

[mike]

I did my annual Ovenbird Count in Willow Springs Open Space (WSOS)  
this year on June 3 & 4 with the help of Michael Kiessig and Audrey  
Boag.   The survey produced 19 (maybe 20) singing Ovenbirds.  Each  
year I have done the survey, I have had 19 - 21 singing Ovenbirds in  
WSOS.


Mike Henwood
Morrison
Jefferson County

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[cobirds] Summer Tanager - Mesa County

[mike]

While doing Atlas work on the Western Slope last week, I observed an  
immature male Summer Tanager in the Escalante Forks area in Mesa  
County on June 7.   It was foraging in and around an old farm house in  
what once had been a lawn and orchard (now reverted to a wild state).   
I was on private property with permission.  According to Coen Dexter,  
there are only a few records of Summer Tanagers on the Western Slope.


Mike Henwood
Morrison
Jefferson County

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[cobirds] Colorado RBA, Monday, June 13, 2011

[Joyce Takamine]

Date:   June 13, 2011
e-mail: rba@cfo-link.
phone: 303-659-8750
compiler:  Joyce Takamine

This is the Colorado Rare Bird Alert for Monday, June 13, 2011
updated at 7AM,sponsored by Denver Field Ornithologists and the
Rocky Mountain Bird Observatory.  If you are phoning in a message, you
can skip the recording by pressing the star key (*) on you phone at
any time.  Please leave your name, phone number, detailed directions,
including county and dates for each sighting.  It would be helpful if
you would spell your last name.

Highlight species include: (* denotes that there is new information on
this species in this report)

Little Blue Heron (*Weld)
Green Heron (*Boulder, Mesa)
YELLOW-CROWNED NIGHT-HERON (*Weld)
GLOSSY IBIS (Weld)
Broad-winged Hawk (Douglas, *Jefferson)
PURPLE GALLINULE (Logan)
Snowy Plover (Otero)
Piping Plover (Sedgwick)
WESTERN GULL (Douglas/Jefferson)
Caspian Tern (*Boulder, *Larimer, Mesa)
Least Tern (Otero)
White-winged Dove (*Boulder)
American Three-toed Woodpecker (*Larimer)
PACIFIC-SLOPE FLYCATCHER (*Boulder)
Eastern Phoebe (*Boulder, *Baca)
Red-bellied Woodpecker (*Prowers)
Great Crested Flycatcher (Logan)
SCISSOR-TAILED FLYCATCHER (*Jefferson)
White-eyed Vireo (Douglas/Jefferson)
Carolina Wren (*Bent)
Chestnut-sided Warbler (Jefferson, Larimer)
YELLOW-THROATED WARBLER (*Larimer)
Blackpoll Warbler (El Paso)
Ovenbird (Boulder, Douglas, Larimer)
HEPATIC TANAGER (*Huerfano)
Black-throated Sparrow (*Fremont)
Northern Cardinal (El Paso)
Indigo Bunting (Fremont, *Huerfano, Jackson)
PAINTED BUNTING (*Prowers)

Baca County:
--An Eastern Phoebe was reported by Mark Miller at Two Buttes On June 12.

Bent County:
-- Bent's Old Fort Inn in Las Animas  on June 12,, Mark Miller
reported a singing Carolina Wren.

Boulder County:
--2 singing Ovenbirds were reported by Nunes on Shanahan Ridge Trail
in Boulder on June 5.
--Eastern Phoebes were reported by Floyd at the 75th St Bridge over
Boulder Creek on June 6.  Bob Spencer refound the Eastern Phoebe on June 11.
--A singing Ovenbird was reported by Margaret Smith on the Mesa Trail
south of the Bear Canyon Trailhead on June 7.
--Pieplow reported a singing White-winged Dove in the Gunbarrel area
of Boulder on June 11.
--2 Green Herons were reported by Bob Spencer along the west and north
shore of Cottonwood Marsh on June 11.
--A Caspian Tern was reported by Mlodinow at Cottonwood March on June 12.
--A possble PACIFIC-SLOPE FLYCATCHER  has reported by Mlodinow in
Gregroy Canyon on June 12.

Douglas County:
--3 singing Ovenbirds were reported by Burns along the 5.5 mile
Mountain Top Loop Trail at Spruce Mountain Open Space which is south
of Larkspur on June 5.
--A Broad-winged Hawk was reported by Roller near the American
Three-toed Woodpecker spot on Hwy 67 on June 11.
--Kilpatrick had a flyover Broad-winged Hawk where Titan Road crosses
Plum Creek on June 11
--Walbek heard a singing Ovenbird in Castlewood Canyon SP on June 11.

Douglas/Jefferson Counties:
--An ad WESTERN GULL was found by Walbek on the Marina Sandspit at
Chatfield SP on June 1.   On June 10. Ellis reported the WESTERN GULL
at the sand spit on Plum Creek Delta around 2:45 pm and at 5:pm
Gillilan reported the gull on
the swim beach.   On June 11 at 6 am Kellner reported that the WESTERN
GULL was on the South Marina docks.   This is a first state record (if
accepted by the about
Records Committee).
--A singing White-eyed Vireo was reported by Keller at the south
Marina Sand spit in trees at the base of the spit.

El Paso County:
--At Chico Basin Ranch (fee area) at the banding station on June 5,
Bill Maynard reported a singing Northern Cardinal and a singing
Blackpoll Warbler,

Huerfano County:
--Nelder reported on June 12 HEPATIC TANAGER  and Indigo Bunting on Rouse Road.

Jackson County:
--An Indigo Bunting was reported by Hunter at Lake John on June 8.

Jefferson County:
--A Broad-winged Hawk was reported by Lewis at Welchester Tree Park
working the west end of the park on June 5.  Sanders reported that the
Broad-winged Hawk was in the same area on June 6 and calling a lot.
On June 8, Sanders reported that the Broad-winged Hawk was still in
the same area.  On June 9, Schottler reported 2 Broad-winged Hawks at
Welchester Tree Park.  One was juv but he did not get a good look at
the second to judge age.   On June 10, Sanders again saw the light
morph hawk at Welchester Tree Park in the west end of the park.   Mark
Chavez reported the juv Broad-winged Hawk in Welchester Tree  Park on
June 12.
--A singing f Chestnut-sided Warbler was found by Tammy Sanders at the
entry bridge over the little canal to Welchester Tree Park on June 10,
later it was singing away in the SE part of the park.
--A possible SCISSOR-TAILED FLYCATCHER was reported by Kelly on the
Denver Audubon Field Trip to Red Rocks on June 11.   It was flying
around the observation deck across from the trading post.  They tried
to relocate the bird but could not.

Larimer County:
--At Lake Estes on June 10, Matthews reported Ov

[cobirds] Mesa Trail complex, Boulder County, June 12th

[Ted Floyd]

Hello, Birders.
 
Marcel Such and Joel Such and I had a nice amble (hah!--it was a mountain 
marathon) around the Mesa Trail complex of southeastern Boulder County early 
yesterday morning, Sunday, June 12th. Here are some highlights:
 
Owls and nightjars. Several Northern Pygmy-Owls and Northern Saw-whet Owls; one 
of the latter went totally berserk. Lotsa Common Poorwills, but we heard just 
one Common Nighthawk.
 
Yellow-billed Cuckoo? I thought I heard one, well before sunrise, down in (or 
flying over?) the floodplain forest downstream from the main parking area. But 
it was distant, and I couldn't get Marcel and Joel on the bird, and ya gotta 
worry about those pesky Yellow-breasted Chats...
 
Grasshopper Sparrows. Two singing in a little patch of prairie near where the 
Mesa and Big Bluestem trails come together.
 
Rose-breasted Grosbeak. A nice after-second-calendar-year male singing from a 
ponderosa pine near the beginning of the Towhee Trail.
 
Red Crossbill. several flyovers by Type 2s.
 
And all the usual stuff: Dusky and Cordilleran (lots) and Hammond's (one) 
flycatchers; Plumbeous Vireos; all three nuthatches; Canyon Wren; Gray 
Catbirds; a few Cedar Waxwings; Virginia's, Yellow, Audubon's, and 
MacGillivray's warblers; more than two dozen Yellow-breasted Chats; several 
Green-tailed Towhees and a great throng of Spotted Towhees; lots of Western 
Tanagers, Black-headed Grosbeaks, and Lazuli Buntings; and one or two Cassin's 
Finches. 
 
---
 
Ted Floyd 
Editor, Birding 
 
Blog: http://tinyurl.com/4n6qswt 
 
Twitter: http://tinyurl.com/2ejzlzv 
 
Facebook: http://tinyurl.com/2wkvwxs
 
---   

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[cobirds] Eastern Warbling-Vireos at Walden Ponds, Boulder County

[Ted Floyd]

Hello, Birders.

Back on Thursday evening, June 9th, Hannah and Andrew and I saw and heard a 
pair of apparent Eastern Warbling-Vireos at Walden Ponds, Boulder County. For 
now, of course, there is "officially" just the one species of warbling-vireo, 
referred to as Warbling Vireo, Vireo gilvus. But some ornithologists believe 
two species are involved, and they are generally referred to as Eastern 
Warbling-Vireo, Vireo gilvus, and Western Warbling-Vireo, Vireo swainsoni. An 
interesting question in Colorado is, How far west does Eastern Warbling-Vireo 
get? Does it overlap (is it "sympatric") with Western Warbling-Vireo?

On Saturday morning, June 11th, I obtained sound recordings of the male. Here 
are links to sound spectrograms of three songs from the bird:

http://tinyurl.com/6gcxv2r
http://tinyurl.com/6ztbwge
http://tinyurl.com/6k77vda

Note the sharp, high-pitched note at the end of each. Note also the overall 
singsong (up and down) phrasing, consisting of relatively pure-tone notes 
(i.e., relatively thin, not especially thick, squiggles). I believe that the 
preceding suite of audio field marks are good for Eastern Warbling-Vireo. If 
you see the birds, note their large size overall, their relatively large bills, 
and their yellower tones below, especially on the flanks. (Re: size. Eastern 
Warbling-Warbling Vireos are suprisingly big, closer in size to Red-eyed Vireo 
than to Western Warbling-Vireo.) But the visual differences are minor; the 
differences in song are the key points of distinction.

Something to beware of out there: There are other warbling-vireos nearby, both 
"good" Western Warbling-Vireos, I believe, and one or two weird, intermediate, 
indeterminate jobs.

And there's lotsa other stuff at Walden. During the course of my visits there 
on Thursday evening and Saturday morning, I saw and/or heard: Wood Ducks in 
double digits; Green Heron; Orchard Oriole; Eric Zorawowicz; Eastern Phoebes 
and American Dippers still under the 75th Street bridge; and little colonies of 
Rock Wrens and Marsh Wrens. The wrens are interesting. I don't think of Rock 
Wren as a summer bird for Walden Ponds, but there's a big new rock pile (quarry 
operation...) at the west end of the complex, and that's where they are. The 
Marsh Wrens have done something odd: As far as I can tell, they've bailed on 
Cottonwood Marsh, where they were so conspicuous in April and into early May; 
but there's a bunch of them farther west now, at the long pond that separates 
Walden Ponds proper from Sawhill Ponds. I think they may have just up and 
moved, for whatever reason; Marsh Wrens (and especially Sedge Wrens) are known 
to do such things.

---

Ted Floyd 
Editor, Birding 

Blog: http://tinyurl.com/4n6qswt 

Twitter: http://tinyurl.com/2ejzlzv 

Facebook: http://tinyurl.com/2wkvwxs

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