May 25, 2012

Nesting Osprey


Marcel and I found a pair of Osprey nesting at one of our Burrowing Owl survey areas in Boulder County in late April.  They've got a nice fishing pond adjacent to the Saint Vrain River to the south and great views of the Twin Peaks - Longs and Meeker.  We were just back to the site yesterday (May 24) and oddly, there were five Osprey around the nest.  BTW:  There are no Burrowing Owls at this site.

All photos by Joel Such




















The Ospreys have a couple avian neighbors of interest . . . a Red-tailed Hawk pair and Bobolinks.  The Red-tailed Hawk pair are on a nest in a grove of Cottonwoods, which is conveniently located in the middle of the prairie dog town.  They raised a couple of young here last year.  The lush, grassy fields to the east harbor nesting Bobolinks that we've been observing for years.  Boulder County now works with that landowner to ensure that the young are able to fledge before these fields are cut.


Bobolink

April 29, 2012

Dodd Reservoir Restoration Project

Among the projects Joel and I are working on this summer, one of the most exciting is a habitat restoration taking place at Dodd Reservoir with our Boulder County Audubon Teen Naturalists program. This area, located between Boulder and Longmont off of the Diagonal Highway, is owned by Boulder County Audubon.  The grassland and riparian areas are being restored to native vegetation from highly-invasive and biologically sterile Smooth Brome grass (Bromus inermis).  If successful, this will be the first time that a Smooth Brome-infested property in Boulder County has been restored. This being ground-breaking research, the things we discover will likely be implemented into other such projects in the future.  Among the tasks that we, the Teen Naturalists, have been assigned are bird and butterfly surveys to track population and biodiversity changes throughout the project, as well as the planting of native shrubs and trees on the property and the drilling of holes for native pollinators.



View Larger Map

So far, we have made two visits out to the site.  During the first, in mid-March, we set up the survey transects on the property and made initial surveys.  For the second, in late-April, we continued with our bird and butterfly surveys as well as planted nearly 50 native shrubs along the southern shore of the lake.  Before that last visit the entire north shore was supposed to be burned by the county, but this will have to be postponed nearly a year because of a state-wide fire ban due to a "controlled" burn near Evergreen that got out of control and destroyed numerous homes and took three lives.

If you are a teen in the Boulder County area, and want to participate, please contact us.  And for anybody wanting further information and updates, like us (Boulder County Teen Naturalists) on Facebook here!






February 5, 2012

2012 Valmont Gullapalooza!

Yesterday, February 4th, was the annual American Birding Association/Boulder Bird Club/Colorado Field Ornithologists/Denver Field Ornithologists/Xcel Energy Valmont “Gullapalooza” field trip, with leaders Ted Floyd, Nick Komar, Bill Kaempfer, Steve Mlodinow, Christian Nunes, Joel Such, and Marcel Such.  For an overview of this event’s history, see my previous blog post here: suchbros.blogspot.com/2011/01/valmont-gullapalooza-2011.html

No doubt due to a recent blizzard and accompanying cold weather for the past two days and right up to the morning of the trip, participation numbers were brought down to a “mere” total of 92 birders (compared to last year’s all-time high of 227).  To reward the courageous folks that came to brave the knee-high snow and slush around the power plant property, good duck diversity was seen on the lakes, including a Tundra Swan, excellent views of Golden Eagle, Bald Eagle, and Prairie Falcon.  Additionally, there was an unexpected and very exciting Red-necked Grebe that was a lifer for many (including yours truly).

As the sun dipped below the horizon at the end of the day, the die-hards who were still present in the dropping temperatures were awed to see the thousands of floating gulls flocked on Valmont Reservoir rise up into a “snow globe of gulls*,” and drop back down into adjacent Leggitt Reservoir.  Gull diversity wasn’t the best this year (most likely due to the abnormally warm temperatures in previous weeks that has left most area water completely open), but three California Gulls and five Thayer’s Gulls were good additions to the Ring-billed and Herring Gulls that predominantly made up the flock.

*Bill Schmoker coined this most accurate term.







A dead American Coot




Red-necked Grebe with Common and Red-breasted Mergansers

Bald Eagles


Prairie Falcon

Golden Eagle




A "snow-globe" of gulls.


Cackling Goose
Canada Goose
Tundra Swan
Gadwall
American Wigeon
Wood Duck
Mallard
Green-winged Teal
Lesser Scaup
Canvasback
Redhead
Ring-necked Duck
Common Goldeneye
Hooded Merganser
Common Merganser
Red-breasted Merganser
Hooded Merganser
Ruddy Duck
Pied-billed Grebe
Horned Grebe
Red-necked Grebe
Western Grebe
Double-crested Cormorant
Great Blue Heron
Black-crowned Night-Heron
Bald Eagle
Red-tailed Hawk
Ferruginous Hawk
Golden Eagle
American Kestrel
Prairie Falcon
American Coot
Ring-billed Gull
California Gull
Herring Gull
Thayer's Gull
Eurasian Collared-Dove
Rock Pigeon
Belted Kingfisher
Downy Woodpecker
Northern Flicker
Black-billed Magpie
American Crow
Common Raven
Brown Creeper
Townsend's Solitaire
American Robin
European Starling
American Tree Sparrow
Song Sparrow
White-crowned Sparrow
Red-winged Blackbird
House Finch
House Sparrow
54 species

January 1, 2012

New Year Birding

A Great Horned Owl hooted in the distance.  A few minutes before we had heard a Canada Goose, our first bird of the new year, 2012.  It was 6 in the morning, first light still an hour or so off.  Along with me were Ted Floyd and Joel (a common group as of late).  We walked down the gravel path towards a grove of cottonwood trees at Pella Crossings in Hygiene, Colorado, where we hoped for Eastern Screech-Owl.  Another Great Horned joined the first, and soon we were able to distinguish four owls calling out somewhere in the dark - two males and two females.  Though rather difficult to sex a single bird by call alone, being able to hear them together makes the lower-pitched call of the male easily identifiable.

Now entering the grove, Ted starts whistling an exact imitation of the tremulous, haunting call of the screech-owl.  For several tense minutes, nothing happened.  Then, emanating from a stand of trees on the far side of a meadow, we heard the real thing.  For half a minute, Ted and the owl "sang" with each other.  Then the owl fell silent, as did the imitator.  A new Boulder County species.  Walking as quietly as one can on two inches of old, crusty snow and dry grass, we made our way across the field.  Trying again to coax the little owl into calling again, we stood still and waited as Ted again tried to work his magic.  But to no avail, the woods stood silent.

photo by Joel Such

With the sun now breaching the horizon, other birds started awakening.  A flock of starlings whirred overhead - they would cause us trouble later by uttering perfect imitations of both Killdeer and Blue Jay.  Red-winged Blackbirds called from a nearby cattail marsh as Brown Creepers and a Downy Woodpecker worked the overarching cottonwood branches above our heads.  Though surrounded by ponds, we had to search for open, un-iced water.  We found this in the form of two private ponds bordering the public land.  Ducks and geese clogged these refuges in an otherwise frozen world.  Despite our probing searches of these flocks, we neglected to turn up anything beyond the normal species: Canada Geese, American Wigeons, Redheads, Ring-necked Ducks, Common Goldeneyes, Common Mergansers, and American Coots.

Returning to the car, we also encountered a flock of wintering passerines near the trailhead.  Searching through the flock, we found it contained numerous Song Sparrows, gambelii White-crowned Sparrows, Dark-eyed Juncos (of the Slate-colored, Oregon, and Pink-sided flavors), plus an incredible three Harris's Sparrows (a new county bird for me and Joel) and two "Myrtle" Yellow-rumped Warblers.

Immature Harris's Sparrow - photo by Marcel Such

Continuing on up into the mountains, we encountered a herd of completely unconcerned Bighorn Sheep licking salt off of Highway 7 just up canyon from Lyons.  In Allenspark at the famous Fawnbrook Inn, we watched the feeders there and listened for an incoming flock of rosy-finches.  Unfortunately, we never heard the raucous chatter that accompanies a massive flock of these mountain finches.  However, we still saw two rosy-finches, a normal interior west Gray-crowned Rosy-Finch and coastal "Hepburn's" Gray-crowned Rosy-Finch, along with a flock of Evening Grosbeaks.  At the Olive Ridge Campground near the Wild Basin trailhead in Rocky Mountain National Park, we saw a beautiful adult male Pine Grosbeak.

Bighorn Sheep - photo by Joel Such

"Hepburn's" Gray-crowned Rosy-Finch - photo by Joel Such

Evening Grosbeaks - photo by Joel Such

Evening Grosbeak - photo by Joel Such

Pine Grosbeak - photo by Joel Such

 Red-breasted Nuthatch - photo by Marcel Such

Returning back to the foothills level, we stopped by our neighbor Davis's house.  The purpose of this: Ted hadn't seen Pinyon Jays in Boulder County since he started eBirding in 2007.  Davis resides in Larimer County, a mere stone's throw from the county line.  Reclining on deck chairs overlooking his feeders, Davis sets out a handful of peanuts in an attempt to draw these Pinyon Pine specialists out of the depths of the adjacent Sisk conservation property.  For a half-hour, we waited in suspense, for their gaudy calls to reveal their presence.  With time constraints on Ted's part, we were forced to retreat to the car.  Before that, however, we made a quick trip up to the top of the boulder pile just east of the Davis house.  There, we caught the distant calls of a flock of Pinyon Jays.  Staying just long enough to confirm that at least some of the birds were calling from the Boulder County side of the fence, Ted returned us to our house by noon.  It was a productive morning of birding with 45 species seen on the first day of 2012.

December 30, 2011

Oldsquaw Twitching

Yesterday we "chased" an Oldsquaw, or to be more scientifically and politically correct, a Long-tailed Duck, Clangula hyemalis.  Though not particularly rare in Colorado,  this species has eluded us ever since we started birding.  I (Marcel) finally saw my lifer Long-tailed Duck in Maine this summer, but Joel had yet to see one.  Seizing the opportunity of visiting the Denver Art Museum, we took the short side trip to the Denver City Park to look for a long-staying immature male bird.  True to form, we easily found it in the Duck Pond behind the Denver Zoo, among the more common Mallards, Northern Shovelers, Redheads, Ring-necked Ducks, Common Goldeneyes, American Coots, and Canada Geese.

All photos by Joel Such



Canada Goose - 3000
American Wigeon - 4
Mallard - 16
Northern Shoveler - 8
Northern Pintail - 4
Redhead - 8
Ring-necked Duck - 14
Long-tailed Duck - 1
Bufflehead - 6
Common Goldeneye - 11
Pied-billed Grebe - 2
American Coot - 12
Ring-billed Gull - 35
Rock Pigeon - 3
Black-billed Magpie - 3
American Crow - 20
American Robin - 4
European Starling - 100
House Sparrow - 6

19 species