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Checklist S53060841

 
Location
Boulder Creek--linear, Millennium Hotel, Boulder County, Colorado, US ( Map )
Date and Effort
Sat Feb 23, 2019 7:10 AM
Protocol:
Traveling
Party Size:
2
Duration:
1 hour(s), 31 minute(s)
Distance:
2.1 kilometer(s)
Observers:
Nick Minor List , Ted Floyd
Comments:
With Nick Minor. Started the checklist at 7:10 when we were as far downstream as we got; distance along the creek by Google Distance Calculator. ~15 minutes of non-birding whilst waiting for Nick's Green Ride. Was with Nick most of the time, but not at the end. Weather: 19 degrees Fahrenheit at end, overcast, humid, with ~1 inch of new snow and ice; 28 degrees Fahrenheit by end, sunny, drier; no wind during the morning. Creek mostly open, although with ice shelves everywhere; new snowfall overnight.
Species
19 species (+3 other taxa) total
1

A notably small, dumpy bird; probably just a small Richardson's.

100

Most were this taxon, as expected. Didn't see any candidate Taverner's.

10

A group on the west bank of the westernmost of the Confluence Ponds.

25

A decent-sized group mixed in with the Richardson's.

200
Cackling/Canada Goose

Mostly on a distant flock we didn't close to.

50

A tightly packed feeding scrum.

50

Widespread along the creek, plus some on the Confluence Ponds.

1

Hen.

5

4 hens, 1 SY male.

5

Under the Folsom St. Bridge.

2

Male zipping under the 28th St. bridge heading upstream. Another (sex undet'd) well downstream.

1

Singing, although rather half-heartedly so.

35

Most were coming off the usual night roost in/near The Hill (west side, up against foothills/Chautauqua).

7

Video of this bird: https://youtu.be/XwG9rm-pS2Q

ML142241951

© Ted Floyd

Average Quality

Typical aspect.

Age:
Unknown
Sex:
Sex Unknown
ML142242311

© Ted Floyd

Average Quality

Same bird as in ML142241951; note the appearance of white-based throat feathers, an illusion.

Age:
Unknown
Sex:
Sex Unknown
ML142242771

© Ted Floyd

Average Quality

Gnarly maxilla. (Same birds as in ML142241951, ML142242311.)

Age:
Unknown
Sex:
Sex Unknown
ML142243941

© Ted Floyd

Average Quality

Well hello there! Note that this bird is not necessarily the same as that in ML142241951, ML142242311, and ML142242771.

Age:
Unknown
Sex:
Sex Unknown
ML142245371

© Ted Floyd

Average Quality

This is the same bird as in ML142241951, ML142242311, ML142242771. Sorry about the truck backing up, the air brakes, and the constant drone of a heating system. But, hey, that's typical of the acoustic environment of the species in downtown Boulder!

Behaviors:
call
Age:
Unknown
Sex:
Sex Unknown
Playback:
Not used
Recorder:
Olympus LS-10
Microphone:
standard
Accessories:
none
ML142246241

© Ted Floyd

Average Quality

Remiges. But which ones? Quick! To the phones! Where's Pyle when ya need 'im?

Age:
Unknown
Sex:
Sex Unknown
ML142247001

© Ted Floyd

Average Quality

Anisodactyly well presented; note molt limit at P3, haha.

Age:
Unknown
Sex:
Sex Unknown
6

Widespread vocalists, including songsters and alarm-callers.

0

Thought we heard one along the creek at Scott Carpenter Park; not sure.

2

Video of the bird in ML142250531, ML142251011, ML142251811 posted here: https://youtu.be/wT6hCcr_7R0 and here: https://youtu.be/Y5w5JZFoGh8

ML142249671

© Ted Floyd

Average Quality

This is the first dipper we saw, just below the Arapahoe Ave. bridge (so immediately upstream from the Foothills Pkwy bridge). It's funny, when we saw this bird in the field, I coulda sworn it had an all-black bill (adult character), but this image shows a bit of color; so maybe this is an SY?

Age:
Unknown
Sex:
Sex Unknown
ML142250531

© Ted Floyd

Average Quality

This dipper was as far upstream as I got (after Nick had gotten his airport shuttle). Presumed adult by song and morphology. Not sure we can say what sex, though; do female dippers sing?

Age:
Adult
Sex:
Sex Unknown
ML142251011

© Ted Floyd

Average Quality

This is the song of the bird in ML142250531. Unavoidable background creek noise, of course.

Behaviors:
song
Age:
Adult
Sex:
Sex Unknown
Playback:
Not used
Recorder:
Olympus LS-10
Microphone:
standard
Accessories:
none
ML142251811

© Ted Floyd

Average Quality

Another cut from the bird in ML142251011.

Behaviors:
song
Age:
Adult
Sex:
Sex Unknown
Playback:
Not used
Recorder:
Olympus LS-10
Microphone:
standard
Accessories:
none
3

Widely spaced birds in treetops, giving the sharp "tyeep!" calls.

3

A couple of treetop birds, fairly "worn" (i.e., in breeding aspect).

8

Widespread, mainly high flyovers.

1

Flyover, near Confluence Ponds.

10

Songsters at the Confluence Ponds.

2

Chirping away near the Millennium Hotel front lobby.

 

Are you submitting a complete checklist of the birds you were able to identify?

Yes