April 8, 2013

Industrial Owls

This morning, we had the great privilege of observing and photographing a Great Horned Owl nest at the Lyons Cemex cement plant. Situated about 50' feet up the side of a building atop supporting I-beams in an old Common Raven nest, the pair of adults has successfully hatched two young. We donned hard hats and safety glasses, climbed on catwalks high above the ground, and attained a unique view into its nest from above, while maintaining a comfortable distance for the owls.

by Marcel Such

by Marcel Such

by Joel Such

by Joel Such

The following photographs give a better perspective of the nests location at this industrial site.

The nest is in the central part of this image.
by Joel Such

Zooming out even farther, the nest is located just to the right of the lower "X."
by Renée Haip

Looking up from the ground, the nest is on the structure to the left.
We photographed from the catwalk and stairs in the middle of the cylindric structure.
by Renée Haip

Joel photographing the nest.
by Renée Haip

Joel, Marcel, and Ron Harden atop the catwalk.
by Renée Haip

Ron Harden of Foothills Audubon and Sally Stine-Villani of Cemex
working their way down the long inclined catwalk.
by Renée Haip

Though the owls are nesting in the midst of a modest sized industrial complex, the plant is situated on about 1,800 acres, which includes an open pit mine, reclaimed lands, and natural areas—prairie and riparian. Additionally, there are Boulder County Open Space lands and farms surrounding the Cemex lands giving the owls plenty of territory for hunting.

Thanks to Denise Arthur, Environmental Manager at Cemex for extending the invitation to see this unique nesting site and to Sally Stine-Villani for being our guide.

March 18, 2013

The Cranes of Lewellen

This past weekend, Boulder County Audubon Teen Naturalists travelled 3 1/2 hours northeast to the Nebraskan panhandle. Our group mentor, naturalist Steve Jonesauthor of The Last Prairie: A Sandhill Journal and co-author of the Peterson Field Guides: The North American Prairieguided us around a place he's studied for the past twenty-five years. Also on our trip was the photographer and filmmaker, John WellerCheck out his work on the Ross's Sea at johnbweller.com; it's amazing and relevant!

Our primary mission for this trip was to see cranes . . . lots of them, in fact. 15,000 to 20,000 Greater Sandhill Cranes stop over on the North Platte River near Lewellen, several miles upstream from Lake McConaughy. Additionally, thousands of ducks and geese also use the river and surrounding cropland to gather on their journey north in the spring. It was an amazing trip full of opportunities to photograph and record birds, hike through historically and biologically rich landscapes, and hang out with others interested in the natural world.

Prior to meeting up with the rest of the group in Nebraska, we stopped at Jumbo Reservoir in Northeastern Colorado. Wind was blasting our faces as white caps raced across the reservoir through immense numbers of waterfowl. The biggest spectacle was a massive flock of Snow Geese clustered tightly in  the center of the reservoir. Suddenly, a Bald Eagle passed overhead and the geese began to lift and shift like specks in a freshly shaken snow globe only to resettle when danger had passed.

Once at Lewellen, a small, friendly town of 226 or so people, we wandered back roads and came across cranes lifting off from a nearby field and flying right over the top of us at fairly close range. The following photos are all Greater Sandhill Cranes.

by Renée Haip

by Marcel Such


by Joel Such


by Marcel Such

by Marcel Such

by Joel Such

We met up with the others at dusk on the south side of the Old Lewellen Bridge to have dinner and watch the cranes fly in and practice our hand at photographing in the fading light. Some of the images capturing a sense of motion turned out to be very interesting.

Northern Pintails - by Joel Such

Snow Geese - by Joel Such

Greater Sandhill Cranes - by Joel Such

Greater Sandhill Cranes - by Joel Such

Greater Sandhill Cranes and the Moon - by Renée Haip

We split up into two spots for camping; our group of four was stationed right along the river in ear shot of roosting cranes and the nearly ever present whistles of trains. The morning fly out was spectacular though a bit too dark and far to successfully photograph.

 Sunrise - by Joel Such

Sunrise on the North Platte River - by Renée Haip

Cranes Flying Over in the Early Morning - by Joel Such

White-tailed Deer near the Old Lewellen Bridge
by Renée Haip

Our morning wanderings took us to the Ash Hollow Cemetery and Ash Hollow State Historical Park, a major stop along the Oregon Trail due to the fresh spring water found there. Distinct wagon wheel ruts were visible on a distant hillside and the cemetery includes one of the few marked graves along the trail. Scratched into local stone, we read that Rachel Pattison, recently wed, died of cholera at the age of 18 in 1849.
Ash Hollow State Historical Park - by Renée Haip

On our way back to Lewellen for a break at The Most Unlikely Place (coffee shop/art gallery/local town hangout), we drove by a grass fire. Though it may have begun as a controlled burn, it had definitely gone wild by the time we got there.

by Renée Haip

Our afternoon was marked by setting up camp in a more sheltered area, as temperatures were expected to begin dropping. Once that was accomplished, we had some free time to explore before heading back out to watch the evening fly-in once again.

The Crew (left to right) - Joel Such, Marcel Such, Levi Stone, Emi Roberts, Alex Posen, and Skye Lewis

A chance to rest . . . getting up early isn't Levi's forte. 
by Renée Haip

This raccoon appeared to have been injured by a predator.
by Renée Haip

We were back at the Old Lewellen Bridge one last time for the evening fly-in, and the sunset and birds did not disappoint.

By Marcel Such

By Marcel Such

By Marcel Such

By Joel Such

By Joel Such

By Joel Such

By Joel Such

By Joel Such

Our final morning with the cranes was spent just downstream of the new Lewellen Bridge. It was bitter cold, and the windchill and humidity gave it an extra measure of bite.


Sunrise with the Cranes - By Joel Such

By Joel Such


This sound clip of Sandhill Cranes was recorded during the fly-out.

Waiting for Cranes to Fly - by Renée Haip

After the cranes roost on the river for the night, they disperse into surrounding agricultural fields to feed.

Snow Geese - by Marcel Such

Feeding Greater Sandhill Cranes - by Joel Such

November 12, 2012

Wintering Raptor Season Begins!

The wintering raptor season has officially started!  We (Boulder County Audubon Teen Naturalists) surveyed a route north of Boulder yesterday, and had an excellent morning.  We found a total 32 raptors consisting of 6 different species, plus an additional four that were seen outside of the count protocol.  A Rough-legged Hawk was notably special, as that species has become particularly uncommon in Boulder County in recent years.  Other unusual finds were a flock of 11 pure-white domesticated doves (apparently a dwarf-sized variety of Rock Pigeon) and a very late Greater Yellowlegs at Lagerman Reservoir.

Bald Eagle - 2 (1 immature and 1 adult)
Northern Harrier - 2 adult males
Ferruginous Hawk - 2 (plus 1 extra)
Red-tailed Hawk - 18 (plus 2 extras)
"Harlan's" Red-tailed Hawk - 1
Rough-legged Hawk (dark-morph) - 1
unidentified buteo - 1
American Kestrel - 2 (plus 1 extra)


Immature Bald Eagle - by Marcel Such

Ferruginous Hawk - by Joel Such

Male American Kestrel - by Joel Such

Rough-legged Hawk - by Marcel Such

by Marcel Such

by Marcel Such

by Joel Such