Wednesday, 8 April 2026

[cobirds] Dinosaur Ridge - Denver Field Ornithologists (08 Apr 2026) 43 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Golden, Colorado, USA

Daily Raptor Counts: Apr 08, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 3 65 92
Osprey 1 8 14
Bald Eagle 1 5 18
Northern Harrier 0 9 21
Sharp-shinned Hawk 5 35 56
Cooper's Hawk 6 61 113
American Goshawk 0 0 1
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 0 0 0
Red-tailed Hawk 5 84 332
Rough-legged Hawk 0 0 0
Swainson's Hawk 0 0 0
Ferruginous Hawk 0 0 9
Golden Eagle 0 1 8
American Kestrel 21 131 270
Merlin 0 1 4
Peregrine Falcon 0 1 3
Prairie Falcon 0 1 3
Mississippi Kite 0 0 0
Unknown Accipitrine 1 3 9
Unknown Buteo 0 0 3
Unknown Falcon 0 1 2
Unknown Eagle 0 0 0
Unknown Raptor 0 2 3
Total: 43 408 961


Observation start time: 09:00:00
Observation end time: 17:00:00
Total observation time: 8 hours
Official Counter Emma Riley, Soren Zappia, Emma Riley, Soren Zappia
Observers:



Visitors:
4 visitors. A few folks, both new and familiar, stopped by to enjoy the birds today! We're excited to see what the next few days bring.

Weather:
Today was pleasant with temperatures in the 60s and 70s F and mostly cloudy skies. Cloud cover was extensive but not complete, with the sun behind dense clouds for a good portion of the day. During the final hour or so, the clouds to the south became hazy. In the first few hours, the wind was calm from the W and SW, but flipped to NE in midday, and intensified to a moderate speed. In the final few hours, the wind calmed but remained NE.

Raptor Observations:
We had a good flight in the morning - the most common species were Cooper's Hawks, Sharp-shinned Hawks, and American Kestrels. Birds were high even early in the morning, visible against the gray cloud cover overhead and to the west. When the wind increased in mid-day, the height of flight dropped drastically, and birds were mostly low past the ridge, with a few birds below eye level. AKs made up a good portion of the afternoon flight, although we had a few other birds including a high distant Osprey. In the final few minutes of the count, we spotted our first Swainson's Hawk of the season, a beautiful light morph adult. It soared high before heading west - while this one didn't migrate, it's exciting to see them back! Outside of the raptors, we had our highest total of White-throated Swifts to date for the season.

Non-raptor Observations:
White-throated Swift 142, Feral Pigeon 3, Northern Flicker 1, Say's Phoebe 1, Black-billed Magpie 1, American Crow 1, Common Raven 3, Black-capped Chickadee 2, American Bushtit 3, Rock Wren 1, American Robin 1, House Finch 2, Pine Siskin 1, Spotted Towhee 1, Western Meadowlark 2

Predictions:
Tomorrow, we expect moderate temperatures with light N and NW winds. Skies are forecasted to start sunny but become cloudy by midday. There is a slight chance of rain in the afternoon - good to have a rain jacket just in case.


Report submitted by Official Counter of the day shown above (dinoridgehw@gmail.com)
Dinosaur Ridge - Denver Field Ornithologists information may be found at: www.dinosaurridgehawkwatch.org
More information at hawkcount.org: [Site Profile] [Day Summary] [Month Summary]
Count data submitted via Trektellen.org - [Project Details]




Site Description
Dinosaur Ridge is the only regularly staffed hawk watch in Colorado and is the
best place in the world to see migrating Ferruginous Hawks. Hawk watchers may
see 17 species of migrating raptors; and it is an excellent site to see rare
dark morph buteos including Broad-winged hawk, Swainson's hawk, Ferruginous
hawk, Rough-legged hawk and Red-tailed Hawk. Other raptors we see include Golden
and Bald Eagles, Northern harrier, Osprey, Peregrine Falcons, Prairie Falcons,
Cooper's and Sharp-shinned Hawks, American Kestrels, Merlin, and Turkey
Vultures. American Goshawk is uncommon but also counted each season. Non-raptor
species include Rock Wren, Bushtit, Western Bluebird, Sandhill Crane,
White-throated Swift, and American White Pelican. Birders of any skill level are
always welcome. The hawk watch at Dinosaur Ridge is staffed by Hawk Counter(s)
and volunteers from March through early May.

Directions to site:
From exit 259 on I-70 towards Morrison, drive south under freeway and take left
into first parking lot, the Stegosaurus lot. Follow hawk watch signs from the
southwest end of the parking lot to the hawk watch site. The hike starts heading
east on an old two-track and quickly turns south onto a trail on the west side
of the ridge. When the trail nears the top of the ridge, turn left, and walk to
the flat area at the crest of the ridge. (Distance: 0.56 miles, Elevation gain:
259 feet)

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[cobirds] Birding this Saturday in Longmont at Golden Ponds

Hello Co-Birders,
Join local bird watcher Carl Starace Saturday morning, April 11 from 8 a.m. - 11 a.m. to observe birds in ponds and surrounding habitats at Golden Ponds Nature Area in Longmont.‍ With a magnificent view of Longs Peak and the Front Range, this park features 88 acres including 56 acres of water surface in four ponds. ‍Possible species include Bald Eagle, White Pelican, Osprey, and Common Grackle.
Find RSVP and location details on the Boulder County Audubon Society website.

Happy birding!
Kit
--
Kit Seeborg
Communication and Outreach Volunteer
Boulder County Audubon Society
Boulder, Colorado

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[cobirds] Nest building Blue Jays & E. Phoebes - Arapahoe

I went out briefly on Monday to the High Line Canal in Centennial and Greenwood Village (Arapahoe County). There, I encountered an Eastern Phoebe pair. (As far as I know, a pair of E. Phoebes has been present in this area only since 2024.) I briefly spotted one collecting nesting material, a little mucky stuff. 

Eastern Phoebes are known for incorporating mosses into their nests. This is what Birds of the World says: "The green moss is an invariable component in nest construction and its presence is diagnostic; late season nests during dry periods may have less moss (HPW)."

Mosses are scarcer in this area, but certainly not absent. There are nice collections of mosses along the creek in spots. Over-irrigated lawns also often have them, usually at their edges. These (the over-irrigated lawns) too, are present in the area.

As someone with a budding interest in bryophytes, I hope to observe and possibly photograph this pair collecting mosses. Unfortunately, for me, I think the nest is in an impossible-to-photograph location along the Little Dry Creek. So it would have to be the birds in action. 

I also encountered a Blue Jay pair creating a twiggy nest over the Little Dry Creek. One of the pair was spending a lot of time sitting atop and moving around the nest, as if to customize the opening. Again, Birds of the World is helpful here, though I don't think it describes exactly what I was seeing -- "Females may shape nest cup by pressing soaked breast against sides of cup. This is perhaps done only when wet leaves are used to line nest (see below)" -- as I didn't notice the birds handling wet leaves.

Later that day, a male Broad-tailed went over me while I was doing nothing in my yard. First of the year for me. 

- Jared Del Rosso
Centennial, CO

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Tuesday, 7 April 2026

[cobirds] Dinosaur Ridge - Denver Field Ornithologists (07 Apr 2026) 76 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Golden, Colorado, USA

Daily Raptor Counts: Apr 07, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 5 62 89
Osprey 1 7 13
Bald Eagle 0 4 17
Northern Harrier 3 9 21
Sharp-shinned Hawk 11 30 51
Cooper's Hawk 23 55 107
American Goshawk 0 0 1
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 0 0 0
Red-tailed Hawk 17 79 327
Rough-legged Hawk 0 0 0
Swainson's Hawk 0 0 0
Ferruginous Hawk 0 0 9
Golden Eagle 1 1 8
American Kestrel 15 110 249
Merlin 0 1 4
Peregrine Falcon 0 1 3
Prairie Falcon 0 1 3
Mississippi Kite 0 0 0
Unknown Accipitrine 0 2 8
Unknown Buteo 0 0 3
Unknown Falcon 0 1 2
Unknown Eagle 0 0 0
Unknown Raptor 0 2 3
Total: 76 365 918


Observation start time: 09:00:00
Observation end time: 17:00:00
Total observation time: 8 hours
Official Counter Emma Riley, Emma Riley, Soren Zappia
Observers: Marina Prado-Echeagaray



Visitors:
We had 9 visitors at the Hawk Watch today including a couple that is hoping to come back soon. Thanks to Janet Peters, Bill Young, Sara Jepsen, Marirosa Donisi, and Chip Dawes for volunteering their time today to help us spot migrants! Soren came in to count for a half day on his day off. Thanks Soren!

Weather:
Today started out cold with low 40 F temperatures but got up into the high 60s low 70s by the early afternoon. Cloud cover was consistent throughout the day making spotting birds a bit easier. Precipitation could be seen in the late afternoon south and west of us. Winds picked up in the late afternoon to a bft of 5 when precipitation could be seen, but died back down by the end of the day.

Raptor Observations:
Today was another fun day of migration with a lot of Cooper's Hawks moving through! The first hour started out slow but picked up pretty quickly with our first bird being a Northern Harrier. Before we knew it we had a handful of Red-tailed Hawks, Sharp-shinned Hawks, and Cooper's hawks all in a thermal. Birds moved high and W for a good chunk of the day, before coming to a standstill once the winds picked up. In the late afternoon we had two adult Bald Eagles come by the ridge, with one of them coming so close we could hear the flap of its wings! One adult then chased the other one south before we lost both of them. Local raptor activity was high and sometimes hard to pick apart from migrant activity during the peak. We got to see some Red-tailed Hawks kiting in the high winds which is always a treat.

Non-raptor Observations:
White-throated Swift 5, Broad-tailed Hummingbird 1, Eurasian Collared-Dove 2, Double-crested Cormorant 1, American White Pelican 1, Say's Phoebe 1, Common Raven 2, Tree Swallow 1, Rock Wren 1, American Robin 2, House Finch 1, American Goldfinch 1, Spotted Towhee 1, Western Meadowlark 1

Predictions:
Tomorrow's weather will be similar to today's with pleasant temperatures and some cloud cover. Some sources predict rain, some don't. Typical Colorado!


Report submitted by Official Counter of the day shown above (dinoridgehw@gmail.com)
Dinosaur Ridge - Denver Field Ornithologists information may be found at: www.dinosaurridgehawkwatch.org
More information at hawkcount.org: [Site Profile] [Day Summary] [Month Summary]
Count data submitted via Trektellen.org - [Project Details]




Site Description
Dinosaur Ridge is the only regularly staffed hawk watch in Colorado and is the
best place in the world to see migrating Ferruginous Hawks. Hawk watchers may
see 17 species of migrating raptors; and it is an excellent site to see rare
dark morph buteos including Broad-winged hawk, Swainson's hawk, Ferruginous
hawk, Rough-legged hawk and Red-tailed Hawk. Other raptors we see include Golden
and Bald Eagles, Northern harrier, Osprey, Peregrine Falcons, Prairie Falcons,
Cooper's and Sharp-shinned Hawks, American Kestrels, Merlin, and Turkey
Vultures. American Goshawk is uncommon but also counted each season. Non-raptor
species include Rock Wren, Bushtit, Western Bluebird, Sandhill Crane,
White-throated Swift, and American White Pelican. Birders of any skill level are
always welcome. The hawk watch at Dinosaur Ridge is staffed by Hawk Counter(s)
and volunteers from March through early May.

Directions to site:
From exit 259 on I-70 towards Morrison, drive south under freeway and take left
into first parking lot, the Stegosaurus lot. Follow hawk watch signs from the
southwest end of the parking lot to the hawk watch site. The hike starts heading
east on an old two-track and quickly turns south onto a trail on the west side
of the ridge. When the trail nears the top of the ridge, turn left, and walk to
the flat area at the crest of the ridge. (Distance: 0.56 miles, Elevation gain:
259 feet)

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[cobirds] Laurie Zuckerman Sent You An Ecard!

YOU RECEIVED AN ECARD!

Laurie Zuckerman (lauriebethzuckerman@gmail.com) has sent you an ecard from BlueMountain.com.

https://abre.ai/o7j9

View Your Ecard

Please do not reply to this email. If you have any questions, issues, or problems regarding this email, please visit our FAQs page.



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Re: [cobirds] Negative bird reports

Hi Tom,

The preferred approach by eBird is to simply create a checklist for the outing where you searched for the rarity, and have that be a complete checklist of all the species you were able to identify. You can put a checklist comment in explaining that you were unable to find the target bird, and of course not include it among the birds you did find in the list. That would be sufficient.

eBird has repeatedly indicated that they do NOT want folks entering "0" for an unfound species.

"Counts of zero birds - not including a bird in your checklist implies a count of zero on a complete checklist, so please don't enter '0' as a number. The one rare exception to this is when using the UN Breeding Code."

Eric




-------
Eric DeFonso
Boulder County, CO


On Mon, Apr 6, 2026 at 9:46 PM tom none <jtcurt325@gmail.com> wrote:
Does anyone know whether there is a mechanism by which a lack of a sighting can be entered into e-bird. I went to look for the white ibis today and could not find it, That might be a useful piece of information for someone coming from some distance to try to see it. I was wondering if one can enter zero for a species to indicate that it was not found.

Thanks, 
Tom Curtis

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Re: [cobirds] Osprey Nesting Platform

Thank you!


From: Ethan Augreen <eaugreen@gmail.com>
Sent: Monday, April 6, 2026 9:00:46 PM
To: Pauli Driver-Smith <hollyhockfarms@msn.com>
Cc: cobirds <cobirds@googlegroups.com>
Subject: Re: [cobirds] Osprey Nesting Platform
 
Hi Pauli,

I recommend reaching out to https://frontrangeeagles.org/contact/

They've done some work in Weld County and care about ospreys too.

On Mon, Apr 6, 2026 at 11:58 PM Pauli Driver-Smith <hollyhockfarms@msn.com> wrote:
Hi Everyone,

For years now I've wanted to install an Osprey nesting platform on my property across from Highland Lake near Mead, Weld County, CO. This is going to be the year, but I need to find someone who knows what they are doing to make and install it. United Power will donate a pole, but it has to be picked up and delivered, something that I have no equipment to do. At my age, I also do not have the ability to build and install one myself.

Can anyone recommend someone who would be able to do this for me?

Ospreys frequent the lake and there are no other nesting platforms that I know of for miles around.

Thanks,
Pauli Smith
Highlandlake/Mead, Weld County, Colorado

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