The 2025 COBC was held on Sept 6, 2025.
Thank you to all who participated and donated!
2025 Challenge Statistics
Big Day 2025 Winners
The Challenge
Winner: 100% Confirmed by Merlin
% of Par: 168%
Total Species: 106
County Birded: Grand (Par = 63)
Green Challenge
Winner: Larimer Helmetcrests
% of Par: 104%
Total Species: 114
County Birded: Larimer (Par = 109)
Under 25
No entrants in this category.
Bird Your Own Way
Everyone is a winner in this non-competitive category. Fourteen teams participated in this category.
Team Results and eBird Links
100% Confirmed by Merlin - Grand County - $405 - 106 species
A Ton of bushtits! - El Paso County - $75 - 63 species
Birding Borchardts - Park County - $360 - 68 species
Boulder Bounders - Boulder County - $200 - 39 species
Boulder's Baronesses - Boulder County - $245 - 29 species
Clear Creek Crossbills - Clear Creek County - $656 - 84 species
Coffee, birding, then wine - Boulder County - $60 - 64 species
Cuckoos for Cocoa Puffs - Boulder County - $285 - 79 species
Davis Deck Viewers - Larimer County - $1,035 - 31 species
Davis Dickcissels - Weld County - $100 - 36 species
DFO's Arapahoe Warblers - Arapahoe County - $200 - 73 species
DFO's Crowley Cruisers - Crowley County - $60 - 86 species
DFO's Douglas County Chats - Douglas County - $515 - 65 species
DFO's Gilpin Explorers - Gilpin County - $375 - 51 species
Ebony & Ivory-Billed Woodpecker - Adams County - $595 - 86 species
Ethan and his crew - Arapahoe County - $175 - 99 species
FlockFinders - Jackson County - $770 - 104 species
Henry Pollock - Bent County
Ken Wat - Arapahoe County - 70 species
Krazy Korvids - Jefferson County - $125 - 49 species
Lanceonthefly - Las Animas County - $60
Larimer Helmetcrests - Larimer County - $940 - 114 species
Late Starter Birders - Weld County - $150
Longmontspurs - Broomfield County - $872 - 80 species
Luke and Dianna's Awesome Big Day - Larimer County - $2,204 - 81 species
Monkey Wrench Gang - Eagle County - $300 - 38 species
More Than a Wood Stork - Broomfield County - $90 - 92 species
NW Denver Flocks Together - Denver County - 27 species
Pawnee Nomads - Weld County - $1,960 - 104 species
Prairie Boiz - Elbert County - $666 - 96 species
Ptarmigeddon - El Paso County - $240 - 45 species
Russell Moses - El Paso County
Sondra Bland - Boulder County - $311 - 58 species
The Great Tits - Arapahoe County - $10
The Warbling Welders - Weld County - $1,590 - 109 species
We Would Like to Speak to the Tanager - Alamosa County - $255 - 87 species
What a Pheasant Surprise! - Boulder County - $202
Winging it in Salida - Chaffee County - $645 - 50 species
The County Birding Event of the Year!
Have fun birding the Colorado county of your choice this fall and help raise funds for CFO and our conservation initiatives. There are lots of ways to participate and see how many species you can find in 24 hours!