[cobirds] Colorado Rare Bird Alert, 11 March 2014

[Joyce Takamine]

Compiler: Joyce Takamine
Date: March 10, 2014
email: rba AT cfobirds.org
phone: 303-659-8750

This is the Colorado Rare Bird Alert for Tuesday, March 11, 2014, sponsored
by the 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 your 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 (* indicates new information on this species in
this report).

Greater White-fronted Goose (Denver)
BRANT (*Douglas)
TUNDRA SWAN (Boulder)
Long-tailed Duck (Denver)
Barrow's Goldeneye (Jefferson, *Larimer)
MEW GULL (Arapahoe)
Lesser Black-backed Gull (Arapahoe, Bent, Weld)
Thayer's Gull (Arapahoe, Bent, Denver, Jefferson, *Kiowa, Weld)
ICELAND GULL (Weld)
GLAUCOUS-WINGED GULL (Arapahoe)
Glaucous Gull (Arapahoe, Bent, Denver, Jefferson, Pueblo)
GREAT BLACK-BACKED GULL (Weld)
Lapland Longspur (Weld)
Sagebrush Sparrow (Montrose)
Harris's Sparrow (Montrose)
GOLDEN-CROWNED SPARROW (Jefferson)
Rusty Blackbird (*El Paso)
Great-tailed Grackle (Boulder, *El Paso, Weld)
Common Redpoll (Rio Grande)

ARAPAHOE COUNTY:
--Dowell reports these gulls at Aurora Reservoir on February 26: MEW GULL,
(ad)., Lesser Black-backed Gulls, (2 ad. & 1  3rd. yr.), Thayer's Gull, (2
juv., 1 or 2 ad.), GLAUCOUS-WINGED GULL, (2nd. winter), Glaucous Gull, (1
ad., 2 immature).
--On March 3, Walbek reports a similar assortment of gulls from Aurora Res,
best seen from the SW corner.

BENT COUNTY:
--On March 8 Mlodinow reported Glaucous Gull, Lesser Black-backed Gull, and
Thayer's Gull at John Martin Reservoir.

BOULDER COUNTY:
--On February 1, Wilberding reported a TUNDRA SWAN at Cottonwood Marsh; the
swan was seen there again on  February 23 by Breitsch, and may still be
around.  On March 8, at Cottonwood Marsh, Hansely reported TUNDRA SWAN and
Great-tailed Grackle.

DENVER COUNTY:
--On March 8 Tina Jones reported 2nd-cyc Glaucous Gull at Marston Reservoir.
--On March 3, T. Jones reports two Glaucous & one Thayer's Gull from
Marston Res.
--On March 4 Baker reports a Greater White-fronted Goose on the NE side of
Sloans Lake, near Stuart Street. Sloans Lake is near Sheridan and 17th Ave.
--Vickery reports seeing a Long-tailed Duck on the South Platte on February
27.  It was across the river from the aquarium, with a group of Gadwalls
and Mallards. On March 1, Breitsch saw it just SW of Speer Blvd bridge.

DOUGLAS COUNTY:
-- Stachowiak reports seeing the BRANT, on February 15, at the southeast
corner of Redstone Park located in Highlands Ranch. Access the parking lot
located on the west side of S Foothills Canyon Blvd approximately 2/10's of
a mile south of W Town Center Drive.  Look straight ahead as you enter the
parking lot or to the left towards the houses on the edge of the park.  I
have located the bird in this area in the past as well. The Brant was seen
by Nunes at Redstone Park on March 8.  Kaemfper reported that the Brant was
seen by the DFO Field Trip on March 9 at Redstone Park.

EL PASO COUNTY:
--On March 10, Peterson reported a f Rusty Blackbird on a pond where
Stetson Hills Rd crosses Sand Creek W of intersections with Peterson.  The
bird was a the north end of the pond.  There were also 8 Great-tailed
Grackles at the pond.

JEFFERSON COUNTY:
--On February 18, Hackos reports seeing a Barrow's Goldeneye at Chatfield
Reservoir over the weekend.  It was in the open water near the dam, west of
the tower.  On February 28, Kibbe reports the Barrow's Goldeneye continues
on the northwest corner of the reservoir. It persisted on March 3,
according to a report by Suddjian.
--On March 2, Teuton and Brooke saw the continuing Golden-crowned Sparrow
at Red Rocks Trading Post. The bird seems to be making infrequent
appearances.
On March 3, Suddjian reported a flock of 11 RUSTY BLACKBIRDS along Plum
Creek at Chatfield SP, downstream of the Plum Creek bridge.

KIOWA COUNTY:
--A Thayer's Gull was reported by Mlodinow at Adobe Creek Reservoir on
March 8.

LARIMER COUNTY:
--A pair of Barrow's Goldeneyes was reported by Baron at Timnath Reservoir
on March 10.  They were seen from the parking lot of open space (South
Shore) off of CR 40.

MONTROSE COUNTY:
--On March 7, Dexter reported Sagebrush Sparrow and Harris's Sparrow on
West 5th Ave near the Nucla Sewer Ponds.

PUEBLO COUNTY:
--On March 3 Percival reports a 1st yr Glaucous Gull at Pueblo Reservoir
south Marina.

RIO GRANDE COUNTY:
--A Common Redpoll was reported by Simmons behind Homelake Cemetery at
Monte Vista on March 9.

WELD COUNTY:
--On March 9 Starace reported 6 Great-tailed Grackles 2 miles S of CR 48
and CR 47.
--Lefko reports Lapland Longspurs call over head in "Raptor Alley", WCR 100
x WCR 23 x WCR 102 x WCR 27 on February 27. They continued on March 2, when
he also found an ad. Lesser Black-backed Gull at Drake Lake.
--On March 2 Mlodinow report

[cobirds] Bohemian waxwings, Steamboat Sp., Routt Co

[Tom Litteral]

A serious number of bohemian waxwings are working the Yampa River bugfest as 
new hatches are available on each sunny day. Almost any bridge over the Yampa 
in town is offering great views of flocks of 50-200 waxwings feasting on the 
wing. Tom Litteral, Steamboat Springs

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[cobirds] RFI: Bohemian Waxwing

[Scott Baron]

Hi,

Interesting to read Tom Litteral's post this morning.  Does anyone know of
a somewhat reliable location for Bohemian Waxwing within an hour or two
drive of Loveland/Ft. Collins?  Ebird has no sightings from the area this
winter and I haven't seen sightings posted to the listserv this winter.  It
seems that this species hasn't irrupted this far south in numbers.

Would love to try to see them before the season is over.  If you have info
to share feel free to reply to me directly at baron dot scott at gmail dot
com.

Thanks,

Scott Baron
Loveland, Colo.

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[cobirds] Re: RFI: Bohemian Waxwing

[Brandon K. Percival]

Christmas Bird Counts in Colorado, on 14 December 2013 had a few Bohemian 
Waxwings.  The Fort Collins CBC found three and the Granby CBC found 95, though 
the most were at Steamboat Springs with 419.  It hasn't been a big year for 
them in Colorado, this winter, last winter was much better.

Brandon Percival
Pueblo West, CO




 From: Scott Baron 
To: cobirds@googlegroups.com 
Sent: Tuesday, March 11, 2014 10:35 AM
Subject: [cobirds] RFI: Bohemian Waxwing
 


Hi,

Interesting to read Tom Litteral's post this morning.  Does anyone know of a 
somewhat reliable location for Bohemian Waxwing within an hour or two drive of 
Loveland/Ft. Collins?  Ebird has no sightings from the area this winter and I 
haven't seen sightings posted to the listserv this winter.  It seems that this 
species hasn't irrupted this far south in numbers.  

Would love to try to see them before the season is over.  If you have info to 
share feel free to reply to me directly at baron dot scott at gmail dot com.


Thanks,

Scott Baron
Loveland, Colo.

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RE: [cobirds] RFI: Bohemian Waxwing

[John]

This is not an invasion year for Bohemian Waxwings.  The intriguing aspect
of this report is that this now represents the third credible
sighting/sightings for the Steamboat area during non-invasion years (over
the last ten years or so).  Is there some other dynamic that encourages
Bohemian Waxwings to migrate south to the Yampa River drainage?

 

John Vanderpoel

 

From: cobirds@googlegroups.com [mailto:cobirds@googlegroups.com] On Behalf
Of Scott Baron
Sent: Tuesday, March 11, 2014 10:35 AM
To: cobirds@googlegroups.com
Subject: [cobirds] RFI: Bohemian Waxwing

 

Hi,

Interesting to read Tom Litteral's post this morning.  Does anyone know of a
somewhat reliable location for Bohemian Waxwing within an hour or two drive
of Loveland/Ft. Collins?  Ebird has no sightings from the area this winter
and I haven't seen sightings posted to the listserv this winter.  It seems
that this species hasn't irrupted this far south in numbers.  

Would love to try to see them before the season is over.  If you have info
to share feel free to reply to me directly at baron dot scott at gmail dot
com.

Thanks,

Scott Baron

Loveland, Colo.

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[cobirds] Re: RFI: Bohemian Waxwing

[Barry]

I haven't seen any waxwings in the Fort Collins area this year, either. One 
reason I've considered is that were late freezes last spring that killed 
off a lot of flowering tree buds that normally would have matured into the 
berries waxwings and robins seem to love. No berries in the usual locations 
(zero hackberries north of CSU campus, e.g.), so no waxwings, I guess.

- Barry Gingrich
  Broomfield, CO

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[cobirds] Canyon Towhee

[Kate Frost]

Yesterday, while checking and repairing bluebird boxes on my trail at
Cherokee Ranch, Michael Kiessig and I spotted a dusty colored bird in the
oak scrub. It was a canyon towhee scratching in the leaf litter. It wasn't
the least bit frightened and we got really close looks at it. I eventually
got in my car and it continued foraging around and under the car. After
about 10 minutes it flew to a perch and started singing.

Rattlesnake  Road, Cherokee Ranch, 6000' elevation.

Kate Frost
Centennial, CO

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RE: [cobirds] Re: RFI: Bohemian Waxwing

[DAVID A LEATHERMAN]

Barry et al,
Bohemians seem like an every 3-5 year occurrence in Fort Collins, so definitely 
not present every year.  I suspect what brings them here has nothing to do with 
the local berry crop.  I suspect what causes them to linger for weeks or months 
has EVERYTHING to do the local berry crop.  I would assess the local juniper 
berry crop in winter 2013-14 in Fort Collins as plenty adequate, and that seems 
to be the main staple of both waxwing species, solitaires, robins, flickers, 
juncos, and starlings.  Hackberry "berries", as you suggest, can be a good 
supplement to juniper berries, and I didn't really take note of the crop on 
them this winter.  Since we had a good population of Bohemians around here in 
winter 2012-2013, I was surprised we had ANY this winter, regardless of spring 
storms and summer mega-monsoons.  Consecutive-year, conspicuous populations of 
all those northern/nomadic invaders (finches, Bohemians, rough-legs, Snow 
Buntings, Snowy Owls, etc.) historically have been decidedly rare in CO.  Thus, 
John Vanderpoel's excellent question re the Steamboat area and two years in a 
row of good Bohemian populations.

Dave Leatherman
Fort Collins

ate: Tue, 11 Mar 2014 10:31:37 -0700
From: barrylgingr...@gmail.com
To: cobirds@googlegroups.com
Subject: [cobirds] Re: RFI: Bohemian Waxwing

I haven't seen any waxwings in the Fort Collins area this year, either. One 
reason I've considered is that were late freezes last spring that killed off a 
lot of flowering tree buds that normally would have matured into the berries 
waxwings and robins seem to love. No berries in the usual locations (zero 
hackberries north of CSU campus, e.g.), so no waxwings, I guess.

- Barry Gingrich
  Broomfield, CO





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Re: [cobirds] Re: RFI: Bohemian Waxwing

[Barry]

Thanks for the explanation, Dave. I saw quite a few waxwings last year, as 
did everybody else. I saw most of them in taller trees, but that's just 
because that's where they were. :-) All of the trees near campus and around 
town where I saw them last year have no fruit. One reason I paid some 
attention to the fruiting trees is that I had no crabapples this past year, 
but I've huge numbers in the past. (Enough to need a snowshovel.)

- Barry Gingrich
  Broomfield, CO

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[cobirds] Possible food explanation for Yampa R. Bohemians

[DAVID A LEATHERMAN]

Tom Litteral posted this morning about flocks of Bohemian Waxwings feasting on 
insects hatching from the Yampa River in Steamboat Springs, visible from 
multiple vantages.  I forwarded his COBIRDS message to my entomologist buddy 
Dr. Boris Kondratieff at CSU.  Boris has described for the first time over 100 
species of aquatic insects, so to call him an "expert" on the subject matter of 
this situation is an understatement.  His response to my question about which 
insect is likely at the heart of the waxwing frenzy in Steamboat Springs was 
roughly, "could be chironomid midges or the common stonefly, Capnia vernalis, 
which hatches at this time of year."

I'm betting the stonefly is the answer.  Capnia vernalis is also known as the 
"Belly Snowfly", "Little Black Stone", "Black Hare's Ear", and the "Canadian 
Willowfly".  It is one of the so-called "winter stoneflies", with the emergence 
period being usually Feb-April.  It is common, occurs in large, warmer rivers 
of the plateau portion of western CO.  Maps available on-line of its U.S. range 
show it occurring from northern NM north and west to Montana and ne 
Oregon/western WA, respectively, and there is an outlying population in 
northeastern MN.  With "Canadian Willowfly" being one of its common names, this 
implies a range that includes at least parts of western Canada (which would be 
within the heart of the Bohemian Waxwing's breeding, migrating, and wintering 
ranges).

Would be cool to document with specimens the basics of the situation Tom 
brought to our attention.  If you, Tom, or anyone else going that way could 
catch a few (15-20), put them in a vial filled to the brim (no air bubbles) 
with rubbing alcohol, and get them to me, I could in turn get them to Boris.  
His confirmation would be a nice little piece of information about a 
charismatic Colorado visitor and situation.  IF the insect involved is, indeed, 
the Belly Snowfly, maybe its common status, combined with the predictability of 
late winter-early spring hatches, is part of why Bohemian Waxwings might be 
more regular in the northwest corner of CO than elsewhere, where major food 
resources (mostly tree berries) aren't quite as predictable.

Lots of conjecture and hypothesizing here, but that's how answers to questions 
begin to take shape, right?

Thanks to Tom Litteral for his post.

Dave Leatherman
Fort Collins
  

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[cobirds] HSR: Dinosaur Ridge (11 Mar 2014) 1 Raptors

[reports]

Dinosaur Ridge
Colorado, USA
Daily Raptor Counts: Mar 11, 2014
---

SpeciesDay's CountMonth Total   Season Total
-- --- -- --
Black Vulture0  0  0
Turkey Vulture   0  0  0
Osprey   0  0  0
Bald Eagle   0  5  5
Northern Harrier 0  0  0
Sharp-shinned Hawk   0  1  1
Cooper's Hawk0  1  1
Northern Goshawk 0  0  0
Red-shouldered Hawk  0  0  0
Broad-winged Hawk0  0  0
Red-tailed Hawk  0 14 14
Rough-legged Hawk0  3  3
Swainson's Hawk  0  0  0
Ferruginous Hawk 0  2  2
Golden Eagle 0  0  0
American Kestrel 0  1  1
Merlin   0  0  0
Peregrine Falcon 0  0  0
Prairie Falcon   1  1  1
Mississippi Kite 0  0  0
Unknown Accipiter0  0  0
Unknown Buteo0  0  0
Unknown Falcon   0  0  0
Unknown Eagle0  0  0
Unknown Raptor   0  0  0

Total:   1 28 28
--

Observation start time: 09:00:00 
Observation end   time: 12:00:00 
Total observation time: 3 hours

Official Counter:Claude Vallieres

Observers:Kathanne Lynch, Paul Slingsby

Visitors:
Novice birders, Bob & Heidi Wolford spent an hour with us asking questions
and vowing to come back on a better weather day. They'd learned of the Site
through the RMBO website. Jim Esten a birder and photographer also visited
with us and was driven away by the inclement weather and had learned of the
Site via Colorado Birder website.


Weather:
A strong gust of wind greeted this writer as I crested the ridge setting
the tone for a short watch day and for the incoming storm. Winds initially
were from the W/NW and changed to E/NE when the approaching weather fronts
collided after 11a.m. Wind speeds were 3-4 on the Beaufort scale.
Temperatures ranged 44-38 degrees (F) but felt much colder. Cloud cover
ranged from 70% to 100% with occasional sunshine in the first 2 hours.
Visibility was initially good at 50 km but deteriorated to less than a
quarter mile at watch's end when Red Rocks could not be seen because of the
corn snow. No rain.

Raptor Observations:
Only 1 migrant was observed today. A determined Prairie Falcon steadfastly
flew North on the West side of the ridge and disappeared somewhere over
Golden.

Non-raptor Observations:
The first two hours provided local raptor activity with a pair of
Red-tailed Hawks displaying courtship flight. 2 American Kestrels, 1
Prairie Falcon. 2 other Red-tailed Hawks were sighted trying to skillfully
master the strong winds. Other birds sighted early on were flocks of
Juncos, Mountain Bluebirds, American Robins along with individual Northern
Flickers, Black-billed Magpies, Scrub Jays, Townsend's Solitaires and
Ravens.

Predictions:
Weather forecast calls for improved weather, partly sunny with temperature
range 20s to low 50s (F)

Report submitted by Rocky Mountain Bird Observatory (jeff.bi...@rmbo.org)
Dinosaur Ridge information may be found at:
http://www.rmbo.org/


Site Description:
Dinosaur Ridge is the only regularly staffed hawkwatch in Colorado and is
the best place in the world to see migrating Ferruginous Hawks. Dinosaur
Ridge may be the best place in the country to see the rare dark morph of
the Broad-winged Hawk (a few are seen each spring). Hawkwatchers who linger
long enough may see resident Golden Eagles, Red-tailed Hawks and Prairie
Falcons, in addition to migrating Swainson's, Cooper's and Sharp-shinned
Hawks, American Kestrels and Turkey Vultures. Peregrine Falcons and
Ferruginous Hawks are uncommon; Northern Goshawk is rare but regular.
Non-raptor species include Rock Wren, and sometimes Bushtit, Western
Bluebird, Sandhill Crane, White-throated Swift, American White Pelican or
Dusky Grouse. Birders are always welcome. 
The hawkwatch is generally staffed by volunteers from the Rocky Mountain
Bird Observatory from about 9 AM to around 4 PM from the first week of
March to the first week of May.

Directions to

[cobirds] Denver City Park Fallout (pelicans, snow geese, ruddy ducks)

[Eric Lutomski]

During the snow storm today around 2:00 PM 10 American White Pelicans flew 
onto duck lake in Denver's city park. With the pelicans there were about 50 
snow geese 5000 Canada/cackling geese and an assortment of waterfowl 
including 40 ruddy ducks, the highest number I've counted on duck lake. As 
the snow stopped around 4:30 the entire flock took off to the north and all 
the remained were 4 Hooded Mergansers and a couple pairs of Canada Geese 
and Mallards. It was a short but very neat experience in city park today.


Eric Lutomski
Denver CO 

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[cobirds] E Bluebirds, Sandhill Cranes, Cedar Waxwings, Snow and Greater White-fronted Geese in Canon City area

[SeEttaM .]

Yesterday I spotted 4 Sandhill Cranes in the ag fields on MacKenzie Ave.
They have been feeding in these fields off and on (railroad trains and Dept
of Corrections vehicles flush them frequently) yesterday and today.  These
fields had manure spread on them last week and I believe the cranes as well
as hundreds of Canada, 2 Snow and 5 Greater White-fronted Geese are
enjoying the insects in the manure as well as bits of grain.

I also found Eastern Bluebirds in two locations, one my friends property
east of Canon City and the other at Pathfinder Park between Canon City and
Florence.  I observed two males competing for a female by chase and song.
I got a few very short video clips mostly of them singing that I have
uploaded to my Birds and Nature blog. 
I battled extraneous sound from traffic that was not close but loud and
people in this public park.  Interestingly towards the end of the last
video clip a chickadee 'audio-bombs' the video with it's song.

I found two small flocks of Cedar Waxwings both on my friend's property and
in Florence, both feeding on the remaining fruit on Russian Olive trees.
I have photos but haven't had time to upload them to my blog.

Also of interest to some is a 'comma' butterfly I found yesterday is either
a Hoary Comma or a Satyr Comma butterfly (knowledgeable butterflyers differ
as to the id so far)-photos on my blog.

SeEtta Moss
Canon City
http://BirdsAndNature.blogspot.com

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