Denver Field Ornithologists

DFO Annual Checklists - Last 10 Years

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Species	2023	2022	2021	2020	2019	2018	2017	2016	2015	2014
Snow Goose	2,151	1,749	62,717	6	73,087	33,297	43	8	17	27
Greater White-fronted Goose	3	6	19		34	234		3	1	8
Greater White-fronted Goose		25,001			500	1,107				365
Greater White-fronted Goose	62	42	2		507	147	4	8	7	2
Cackling Goose					1	2
Brant						2
Canada Goose	285				30	2	4	11	100
Cackling Goose	2,856	48,345	17,474	11,884	45,139	107,266	6,930	3,131	5,726	5,280
Canada Goose	4,962	29,200	12,429	2,739	19,940	34,208	15,094	12,372	10,973	11,341
Trumpeter Swan		4	2		4	3	1			2
Tundra Swan		6	1		8	7		6	8
Wood Duck	129	231	195	5	238	217	135	126	84	117
Blue-winged Teal	277	1,886	502		326	2,816	693	235	458	264
Cinnamon Teal	52	108	20		145	263	76	37	61	23
Northern Shoveler	5,106	6,627	3,514	2,488	5,032	7,435	2,677	2,673	1,564	1,839
Gadwall	2,859	4,544	2,359	498	2,338	6,305	1,870	1,857	1,320	1,068
Eurasian Wigeon					1
American Wigeon	690	2,143	1,946	248	1,697	2,977	572	646	605	572
Mallard	3,259	7,232	9,149	1,099	7,925	12,265	4,030	3,575	3,553	1,899
Mexican Duck			1
Northern Pintail	273	1,530	194	124	347	1,324	428	314	360	337
Green-winged Teal	1,243	4,076	1,132	153	1,114	3,699	1,077	699	508	654
Canvasback	73	585	77	19	274	751	106	28	9	35
Redhead	402	863	340	104	1,794	3,646	539	297	114	259
Ring-necked Duck	225	967	506	121	1,428	1,458	585	523	306	186
Greater Scaup	99	40	36	23	23	26	46	43	6
Lesser Scaup	1,065	1,176	433	138	1,250	2,072	388	286	227	230
Surf Scoter		4	9		6	9	3	8	3	3
White-winged Scoter	1	1	5		3	4	5
Black Scoter					3	2		4	2	1
Long-tailed Duck	2	2	3	6	11	11	1	4
Bufflehead	697	1,204	5,416	305	7,412	12,206	1,907	2,999	3,619	2,414
Common Goldeneye	1,297	5,035	612	514	2,035	3,797	600	500	863	688
Barrow's Goldeneye	2	42	3	3	60	50	56	98	22	50
Hooded Merganser	525	971	393	171	493	461	292	213	114	227
Common Merganser	1,011	6,667	309	636	3,241	8,035	2,335	2,843	1,558	2,268
Red-breasted Merganser	48	109	59	20	60	73		11	13	10
Ruddy Duck	1,671	1,453	710		1,878	2,573	668	880	447	653
Northern Bobwhite		1				23	8		1	18
Scaled Quail	56	149	15		12	154	28	106	20	19
Gambel's Quail		25				3
Wild Turkey	56	349	121		437	799	324	573	59	109
Greater Sage-Grouse					35			3	3
Gunnison Sage-Grouse						4
Dusky Grouse	2	3	1		11	8	2		4
Sharp-tailed Grouse	9	11			25
Greater Prairie-Chicken	12	50			44	44	6		3
White-tailed Ptarmigan		3	6		7	3	3	2		1
Ring-necked Pheasant	1	11	18		66	162	43	24	59	18
Rock Pigeon	54	199	217	7	224	626	448	362	217	148
Horned Grebe	119	211	29		47	148	122	69	27	103
Red-necked Grebe		3	1			2			3	1
Eared Grebe	554	454	237		815	1,415	909	1,523	218	481
Western Grebe	357	2,961	2,823		1,804	3,646	5,013	4,347	3,772	6,686
Clark's Grebe	3	17	6		29	314	10	11	8	19
Band-tailed Pigeon	3	188			40	14	8	3	1	1
Eurasian Collared-Dove	434	1,612	677	43	980	2,721	559	563	376	438
White-winged Dove	11	56	1		6	12			1
Mourning Dove	1,065	2,313	1,609	1	1,976	4,722	1,772	952	1,006	1,001
Greater Roadrunner		4			1	19		2
Yellow-billed Cuckoo		6				14		6	2	1
Lesser Nighthawk						1
Common Nighthawk	1	48	73		77	117	13	29	9	22
Common Poorwill	41	24	47		58	42	12			3
Mexican Whip-poor-will		1
Black Swift						9				1
Chimney Swift	17	51	45		14	82	23	3	14	1
White-throated Swift	255	1,311	584		329	315	71	109	60	88
Rock Pigeon	547	3,150	2,528	276	2,639	4,751	2,190	930	634	1,457
Ruby-throated Hummingbird						4
Black-chinned Hummingbird	15	41	24		29	44	23	28	20	42
Anna's Hummingbird						1
Calliope Hummingbird		2	1		1	7	3			1
Rufous Hummingbird		26	24		10	47	10	4	4	2
Broad-tailed Hummingbird	214	1,140	604		855	822	583	311	309	251
Virginia Rail	12	70	27	1	43	68	65	34	41	35
Sora	3	18	7		17	37	15	28	44	23
Common Gallinule		1
American Coot	2,112	6,349	6,774	382	10,128	40,043	8,487	13,323	12,644	16,092
Black Rail		12				4
Sandhill Crane	113	16,924	76		192	1,014	3	14	1,075	149
Black-necked Stilt	68	92	2		22	177	51	4	1	13
American Avocet	129	948	227		134	1,366	221	136	126	49
Black-bellied Plover		5	1		1	6				2
American Golden-Plover					1	1
Snowy Plover	3	23	11			9	52
Semipalmated Plover	8	31	10		3	12	7	8	1	3
Piping Plover		1	1			3
Killdeer	315	1,229	979	24	992	1,725	998	718	736	416
Mountain Plover	8	17			12	2	3		1	2
Upland Sandpiper		7			1	7	13
Whimbrel		4			1			1	6
Long-billed Curlew	2	13	9		1	29	1		6	7
Marbled Godwit	23	94	13		2	50	5		1	2
Ruddy Turnstone										2
Red Knot						2
Stilt Sandpiper	2	95	915		33	1,969	168	141	68	20
Sanderling		5	45		2	12	11	9		7
Dunlin		4			2		4
Baird's Sandpiper	51	1,125	1,422		151	2,489	95	425	56	14
Least Sandpiper	44	193	184		73	393	118	40	18	6
White-rumped Sandpiper		1			2	1
Buff-breasted Sandpiper								1
Pectoral Sandpiper		23	31		12	68	5	5	4
Semipalmated Sandpiper	9	109	12		10	42	165	6	6	1
Western Sandpiper		13	10		2	14		1	20	1
Short-billed Dowitcher			4
Long-billed Dowitcher	189	100	31		66	446	195	8	5	10
American Woodcock						1		2
Wilson's Snipe	56	70	21	8	25	172	46	16	15	9
Wilson's Phalarope	300	502	150		36	849	145	315	713	117
Red-necked Phalarope	2	587	2		2	69	1		5	6
Red Phalarope							2
Spotted Sandpiper	88	212	90		162	160	152	160	89	196
Solitary Sandpiper	8	17	14		12	35	24	29	16
Greater Yellowlegs	43	121	74	1	40	272	17	30	41	19
Willet	16	74	3		47	25	36	4	9	18
Lesser Yellowlegs	43	315	340		130	394	68	71	35	16
Parasitic Jaeger						3
Long-tailed Jaeger						4
Black-legged Kittiwake						3		2
Sabine's Gull		3	4		9	9	5	3		9
Bonaparte's Gull	32	51	21		39	179	62	10	7	73
Franklin's Gull	62	960	563	1	266	2,504	630	567	333	1,279
Short-billed Gull	1				1	1
Ring-billed Gull	7,615	19,822	9,338	6,118	12,088	37,161	7,919	5,458	5,061	5,502
Western Gull								1
California Gull	26	709	228	1	627	1,454	792	327	205	168
Herring Gull	29	149	119	52	209	571	56	85	171	78
Iceland Gull		4	3	4	8	13		1		3
Lesser Black-backed Gull	3	29	15	9	22	52	7	1	4	12
Slaty-backed Gull		1
Glaucous Gull		1		1	1	4				1
Great Black-backed Gull	2	2	1		2	7		1		1
Least Tern		1				2
Caspian Tern	2	1	9			5
Black Tern		87	74		49	299	2	113	28	93
Common Tern		10			9	3	3			4
Forster's Tern	20	33	31		34	76	36	26	50	23
Red-throated Loon	1	3						3	1
Pacific Loon		3	1	1	4	2	2	1
Common Loon	18	36	16	1	21	40	16	37	18	19
Yellow-billed Loon		7		1		3
Double-crested Cormorant	1,040	3,570	2,555	14	2,443	6,285	4,030	3,375	2,314	2,600
Neotropic Cormorant		2			1
American White Pelican	738	4,059	3,156		3,860	11,886	4,107	3,394	1,462	1,541
Brown Pelican		1
American Bittern			1			4	4	1	2	4
Least Bittern										1
Great Blue Heron	238	641	562	15	545	1,153	454	510	380	360
Great Egret	6	11	13		5	30	32	17	8	7
Snowy Egret	30	160	312		311	511	443	142	357	246
Little Blue Heron						2		1
Tricolored Heron						1
Cattle Egret			7			11	3		5
Green Heron			1			6			4	2
Black-crowned Night-Heron	26	56	67	1	146	399	344	75	146	79
Yellow-crowned Night-Heron		1				3
White Ibis						1
White-faced Ibis	117	237	112		217	319	465	187	103	235
Turkey Vulture	219	658	321		532	1,024	281	100	126	147
Osprey	16	64	41		43	85	59	39	47	31
Golden Eagle	26	42	24	3	49	66	16	29	16	9
Mississippi Kite	3	35	7		10	34	1		2
Northern Harrier	56	147	56	2	87	237	105	84	66	59
Sharp-shinned Hawk	7	33	11		18	17	19	17	20	14
Cooper's Hawk	46	82	67	2	91	132	96	53	57	69
Northern Goshawk		2			4	7	5	1		3
Bald Eagle	157	307	168	49	363	317	207	126	175	169
Harris's Hawk						1
Broad-winged Hawk	10	3			2	4	3	2		2
Swainson's Hawk	103	136	80		226	408	183	131	181	122
Red-tailed Hawk	394	901	512	80	934	1,221	689	471	423	415
Rough-legged Hawk	20	57	6	3	28	66	13	8	7	42
Ferruginous Hawk	31	49	22	4	56	79	22	22	16	22
Barn Owl		3	2		4	11	26	13	10	6
Flammulated Owl						3
Western Screech-Owl		4				8
Eastern Screech-Owl	1	1			1	3	3	3	1	2
Snowy Owl						1
Great Horned Owl	73	128	84	5	127	133	102	65	84	75
Northern Pygmy-Owl		4	3		1	5	3		3
Burrowing Owl	10	18	5		31	100	30	27	36	55
Long-eared Owl	11					10		7	1	3
Short-eared Owl						5				1
Boreal Owl						1	4	2
Northern Saw-whet Owl	2	15				2
Belted Kingfisher	58	168	126	20	165	227	201	167	167	163
Williamson's Sapsucker	6	25	7		21	42	32	27	11	7
Yellow-bellied Sapsucker	2	3	1		2	1	1	4
Red-naped Sapsucker	1	100	25		62	40	17	10	33	19
Red-breasted Sapsucker						2
Lewis's Woodpecker	2	23	9		14	36	7	8	11	3
Red-headed Woodpecker		87	46		66	161	25	19	14	14
Acorn Woodpecker						6
Red-bellied Woodpecker					1	22	2
American Three-toed Woodpecker		4			4	12	3	3
Downy Woodpecker	114	304	205	20	346	383	310	271	245	181
Ladder-backed Woodpecker	3	20	2		6	11	10	3		8
Hairy Woodpecker	35	129	56	5	101	118	49	39	30	25
Northern Flicker	626	1,281	664	102	1,159	1,556	925	729	724	628
American Kestrel	114	276	153	15	320	569	306	245	173	251
Merlin	3	15	10		19	18	9	17	5	4
Peregrine Falcon	16	18	11		8	25	13	8	10	9
Prairie Falcon	12	24	9	2	33	49	33	16	18	17
Olive-sided Flycatcher		29	5		21	21	9	7	10	18
Western Wood-Pewee	10	466	244		359	469	372	271	133	271
Willow Flycatcher		5	4		10	9	5	4	1	4
Least Flycatcher	13	41	11		22	56	54	15	4	20
Hammond's Flycatcher	5	8	6		20	4	1	9	5	6
Gray Flycatcher	1	2	1		4	11	5	2	7	2
Dusky Flycatcher	15	67	22		18	72	23	15	11	17
Cordilleran Flycatcher	7	191	61		123	113	67	58	49	36
Black Phoebe		1			1	7	7		1
Eastern Phoebe	9	18	1		8	32	33	9	8	9
Say's Phoebe	173	251	189	3	259	318	236	84	171	144
Vermilion Flycatcher						5
Ash-throated Flycatcher	6	35			3	39	3	5	1	3
Great Crested Flycatcher		7			1	2	1	2	1
Cassin's Kingbird	22	80	2		11	70	34	7	11	5
Western Kingbird	276	955	496		672	1,561	648	439	378	348
Eastern Kingbird	9	166	80		130	319	120	89	34	111
Scissor-tailed Flycatcher		2							1
Fork-tailed Flycatcher						1
White-eyed Vireo		2				1	1
Bell's Vireo		7				3		1
Gray Vireo		4				8
Yellow-throated Vireo			2			1				2
Cassin's Vireo		4			2	6	2	3	1	3
Plumbeous Vireo	14	89	39		54	64	67	35	27	22
Philadelphia Vireo							1
Warbling Vireo	30	333	77		124	302	127	86	53	89
Red-eyed Vireo	2	3			2	4	6	2	2	5
Loggerhead Shrike	27	42	24		79	100	68	17	24	28
Northern Shrike	9	17	13	1	13	16	9	9	6	1
Canada Jay	11	30	14		13	22	7	9	12
Pinyon Jay	53	235	66		34	40	2	2	2
Steller's Jay	155	411	310	33	500	199	192	122	160	54
Blue Jay	237	776	452	25	594	857	432	261	210	261
Woodhouse's Scrub-Jay	262	471	233	3	309	227	173	72	92	74
Black-billed Magpie	663	2,117	1,627	223	2,211	2,171	1,537	1,343	1,132	1,025
Clark's Nutcracker	12	102	22	1	91	51	17	49	25	17
American Crow	679	2,689	1,302	240	2,613	1,944	1,030	756	558	502
Chihuahuan Raven		44			7	33	6	3	1
Common Raven	282	861	326	30	883	955	286	152	154	101
Black-capped Chickadee	618	1,568	973	190	1,592	1,540	1,046	943	784	675
Mountain Chickadee	227	849	470	41	965	478	393	218	187	74
Juniper Titmouse	3	6			3	8	13
Horned Lark	1,515	2,555	828	8	1,626	4,460	1,359	1,604	703	862
Northern Rough-winged Swallow	14	118	183		90	370	139	158	220	187
Purple Martin		1	3			5
Tree Swallow	591	2,169	374		884	1,993	896	1,885	3,447	502
Violet-green Swallow	779	1,434	778		2,010	3,971	1,408	2,436	7,424	997
Bank Swallow		67	65		303	712	176	14	41	46
Barn Swallow	209	1,595	1,704		1,559	10,298	2,688	1,428	2,819	1,883
Cliff Swallow	799	2,158	1,542		2,460	7,514	1,704	2,276	1,643	883
Bushtit	124	431	82	58	214	382	100	91	144	123
Marsh Wren		2	1		20	17	14	3
Ruby-crowned Kinglet	36	175	57	2	191	270	135	82	80	55
Red-breasted Nuthatch	35	164	66	31	403	170	125	40	92	58
White-breasted Nuthatch	172	502	308	43	505	429	261	195	135	156
Pygmy Nuthatch	133	816	583	73	1,172	369	305	282	226	116
Brown Creeper	7	17	18	3	118	69	66	39	43	18
Blue-gray Gnatcatcher	16	93	34		226	148	133	74	59	209
Rock Wren	10	65	24		40	69	49	61	71	42
Canyon Wren	4	29	6		27	42	12	18	12	16
House Wren	358	983	648		1,117	1,627	1,537	868	874	1,130
Winter Wren	1	1	1			1
Sedge Wren		1
Marsh Wren	5	13	6	1	22	61	11	40	20	7
Carolina Wren		1			3			1
Bewick's Wren	2	15	2		8	33	5	4	2
American Dipper	21	35	13	3	27	21	10	13	1	16
European Starling	2,860	24,593	4,206	1,612	10,630	26,274	7,537	14,287	2,297	2,962
Gray Catbird	59	202	132		137	206	170	92	53	73
Curve-billed Thrasher	8	28	7		21	29	18	11	17	8
Brown Thrasher	17	39	22		30	93	19	18	13	19
Sage Thrasher	1	80	35		12	74	21	21	75	33
Northern Mockingbird	28	126	9		46	189	16	15	8	17
Eastern Bluebird	2	3			34	78	10		3	13
Western Bluebird	27	69	67		145	470	121	165	115	66
Mountain Bluebird	131	739	403	33	490	1,469	217	173	298	195
Townsend's Solitaire	148	642	317	13	483	217	120	106	73	44
Varied Thrush					3	2
Veery					5	1		5	2	2
Swainson's Thrush	1	14	19		67	27	81	184	1	42
Hermit Thrush	3	53	15		61	77	19	26	13	43
Wood Thrush		2			2
American Robin	2,864	4,679	1,453	54	3,315	5,435	2,687	2,469	1,419	1,334
Bohemian Waxwing	1,326					5
Cedar Waxwing	388	322	325	10	350	331	154	296	53	128
House Sparrow	807	2,296	655	148	1,855	3,390	602	520	404	500
American Pipit	46	124	58	8	99	196	76	70	8	48
Sprague's Pipit		6							5
Evening Grosbeak	169	152	52		19	32	9	35	30	28
Pine Grosbeak	30	11	3		9	11	12	13	4	3
Gray-crowned Rosy-Finch	4	110		43	50	426	80		35	102
Black Rosy-Finch					5	2	1		1	2
Brown-capped Rosy-Finch	406	6	2	1	20	55	47	1	46	1
House Finch	1,261	2,916	1,934	133	2,502	2,627	1,934	909	665	1,127
Purple Finch		1
Cassin's Finch	161	127	6	26	46	51	24	18	55	16
Common Redpoll		35				4	1
Red Crossbill	10	209	2	55	334	102	22	41	64	3
Fox Sparrow		135			194	24	7
Dark-eyed Junco		11
Cassia Crossbill		29
White-crowned Sparrow	103	401	177	9	570	581	383	130	135	59
Lesser Goldfinch	47	403	297		419	472	397	204	166	241
American Goldfinch	213	859	658	30	1,039	1,328	907	612	442	585
Lapland Longspur	1	47	7		2	301		2	4	32
Chestnut-collared Longspur	5	35			76	27	3	4		2
Thick-billed Longspur		36	2		107	29	19	21		9
Cassin's Sparrow	1	19	3		7	45				1
Grasshopper Sparrow	1	15	1		2	22	19	6	2	1
Chipping Sparrow	345	934	792		1,219	1,755	541	915	1,117	560
Clay-colored Sparrow	12	39	11		281	504	54	40	33	141
Field Sparrow		2				17
Brewer's Sparrow	5	83	56		73	169	64	106	103	64
Black-throated Sparrow		1				24
Lark Sparrow	76	527	166		419	618	252	178	239	198
Lark Bunting	258	781	73		1,920	1,677	260	261	122	297
American Tree Sparrow	131	566	327	61	627	434	196	141	54	145
Fox Sparrow		3	5		4	17	2		1
Dark-eyed Junco	361	1,244	647	141	1,669	1,491	784	544	398	349
White-crowned Sparrow	460	1,997	463	14	728	1,815	456	555	540	279
Golden-crowned Sparrow		2				2			1	1
Harris's Sparrow	1	8	2		2	8	7	3		3
White-throated Sparrow	5	1	1			8		1
Sagebrush Sparrow		3			1	4
Vesper Sparrow	62	607	198		233	2,102	522	330	395	139
Savannah Sparrow	10	123	58		39	78	45	38	77	35
Song Sparrow	383	925	433	73	816	867	520	373	284	254
Lincoln's Sparrow	29	109	57		139	228	62	71	52	14
Swamp Sparrow	2	5			2	7	1	1	1
Canyon Towhee	13	40	8		24	79	3	6	3	5
Rufous-crowned Sparrow		4				7		2
Green-tailed Towhee	6	110	48		87	149	70	72	56	38
Spotted Towhee	591	1,264	546	21	594	831	593	288	281	392
Yellow-breasted Chat	63	113	54		91	148	155	73	41	51
Yellow-headed Blackbird	231	1,010	352	1	690	3,652	313	780	220	285
Bobolink		10				17	4	1	5	2
Western Meadowlark	907	1,841	505	22	1,680	3,077	1,993	831	760	528
Eastern Meadowlark							12
Orchard Oriole	4	135	2		9	82	16	10		14
Bullock's Oriole	82	392	116		290	404	318	230	145	123
Baltimore Oriole	1	14	1		1	16		1	1
Scott's Oriole		4
Red-winged Blackbird	3,849	14,127	14,134	669	19,117	30,576	12,138	8,032	5,369	3,886
Brown-headed Cowbird	220	543	393		390	1,382	487	250	278	306
Rusty Blackbird	3	3			13	8			2	2
Brewer's Blackbird	152	1,139	272		163	1,662	227	244	208	371
Common Grackle	1,041	1,681	8,961		1,303	62,359	1,983	579	789	478
Great-tailed Grackle	60	308	110	1	186	2,208	59	27	40	63
Ovenbird	30	29	10		12	27	9	2	2	4
Worm-eating Warbler									1
Northern Waterthrush		2	1		5	7	2	3	5	8
Black-and-white Warbler		2	1		4	1				1
Prothonotary Warbler						2		1
Tennessee Warbler	1				2			2		1
Orange-crowned Warbler	18	22	24		115	112	35	26	42	49
Lucy's Warbler						3
Nashville Warbler	1	3			2	2	1	2	1	2
Virginia's Warbler	45	92	18		29	48	26	16	7	8
MacGillivray's Warbler	22	100	23		50	55	22	11	14	18
Mourning Warbler		1				1
Common Yellowthroat	18	149	77		111	219	161	106	95	125
American Redstart		5	4		9	12	13	9	2	9
Cape May Warbler						1
Northern Parula	1		1		1	1	1
Blackburnian Warbler		1						1		1
Yellow Warbler	314	944	543		682	1,151	1,136	617	392	562
Chestnut-sided Warbler		1	1		3	3		1
Blackpoll Warbler			1		2	1	1		2	1
Palm Warbler		1	2			3
Pine Warbler		1				1				2
Yellow-rumped Warbler	331	678	585	6	1,285	1,098	455	413	370	489
Yellow-throated Warbler	1					2	1	1
Prairie Warbler			1			1			1
Grace's Warbler		2				10	1
Black-throated Gray Warbler	1	1			2	13			1
Townsend's Warbler		20	3		15	6	8		16	29
Hermit Warbler					1
Black-throated Green Warbler						2
Canada Warbler										1
Wilson's Warbler	4	146	231		258	415	154	124	136	260
Hepatic Tanager						2
Summer Tanager	2	2			3	4	1			2
Scarlet Tanager						1
Western Tanager	39	250	106		173	212	145	170	95	54
Northern Cardinal	2	11			6	28	3
Pyrrhuloxia		1
Rose-breasted Grosbeak		1	1		2	2		1	1	3
Black-headed Grosbeak	96	185	67		102	127	113	27	36	79
Blue Grosbeak	16	51	11		35	83	21	19	24	14
Lazuli Bunting	41	113	61		41	99	97	29	22	17
Indigo Bunting		3	2		2	1	1		1	4
Painted Bunting		1					1
Dickcissel		48	2		1	46			5
Total Count	255	336	272	102	307	363	284	275	271	273