Canadian Bird Trends
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Species for which BBS trend data are available: Manitoba

Sort species by: Taxonomic order

Changes to the analysis of 2009 data

The current analysis presented here differs from that done in previous years in three ways: i) start dates were modified, ii) the Canada-wide analysis was better adapted to the species’ range for those species that occur predominately in Western Canada and iii) data from Canadian Wildlife Service’s Grassland Bird Monitoring program were included.

To quantify further the adequacy of the BBS results in describing overall population trends, three additional measures of the credibility of the BBS results were calculated: precision, coverage and non-linearity of the trend.

Visit BBS Statistical Methods for more information on the statistical methods used to produce these trends and annual indices, the credibility measures and an explanation of the differences between the USGS and the Environment Canada’s analytical methods for individual species.

To obtain copies of the credibility measures please contact BBS@ec.gc.ca.

Combined Species Results

For some species that have undergone a change in taxonomy since the beginning of the BBS, the trend results are presented for both the individual species as well as a "combined" trend that includes all data for the species complex. Users may wish to examine both the trends for individual species and the species complex. These species complexes are: Sapsuckers (3 Sphyrapicus spp.), Alder/Willow Flycatcher, Pacific-slope/Cordilleran Flycatcher, Cassin’s/Blue-headed Vireo, and Bullock’s/Baltimore Oriole. The majority of records in Canada used in the Pacific-slope/Cordilleran Flycatcher complex are Pacific-slope Flycatchers. For the Western Grebe and Clark’s Grebe, only the results for the species complex, Western/Clark’s Grebe, are presented. Similarly, the results for the Dusky and Blue Grouse are presented as Dusky/Blue Grouse.

Records 1 to 173 of 173

Common Name	1970–2009 ♦ 1973–2009 + 1986–2009			1970–1989 ♦ 1973–1989			1989–2009			1999–2009
	Trend	P	N	Trend	P	N	Trend	P	N	Trend	P	N
♦  Alder Flycatcher	0.4		62	–			2.0		62	1.0		62
♦  American Bittern	2.5		52	- 8.2		32	5.4		52	- 6.2		52
♦  American Coot	0.5		42	–			- 1.5		42	- 3.8		42
♦  American Crow	- 0.2		65	- 3.9	*	35	1.4		65	- 1.2		65
♦  American Goldfinch	0.1		65	3.2	*	35	- 1.4	n	65	- 1.2		65
♦  American Kestrel	- 3.3	*	58	5.5	*	35	- 4.6	*	58	- 2.9		58
♦  American Redstart	3.3		48	–			2.3		48	- 1.5		48
♦  American Robin	1.4	n	67	3.6	n	36	- 0.3		67	- 2.2		67
♦  American White Pelican	32.2	*	32	–			6.1		32	1.3		32
♦  American Wigeon	0.0		30	–			- 3.7		30	- 4.6		30
♦  Bald Eagle	20.9	*	23	–			19.1		23	18.2		23
♦  Baltimore Oriole	- 2.9	*	55	- 1.2		33	- 3.4	*	55	- 3.6		55
♦  Bank Swallow	- 3.4		43	9.0	n	28	- 3.3		43	3.4		43
♦  Barn Swallow	- 2.0	*	64	- 1.4		35	- 3.1	*	64	0.4		64
♦  Belted Kingfisher	0.1		43	–			0.6		43	- 6.2		43
♦  Black Tern	- 2.9		47	- 8.1		26	- 2.4		47	- 5.7		47
♦  Black-and-white Warbler	9.7	n	47	–			3.1		47	- 0.1		47
♦  Black-billed Cuckoo	- 3.9	*	59	- 3.4		34	- 6.2	*	59	- 8.0		59
♦  Black-billed Magpie	- 0.2		54	- 0.7		30	- 1.8		54	- 3.1		54
♦  Blackburnian Warbler	11.8	n	23	–			0.3		23	0.6		23
♦  Black-capped Chickadee	5.7	n	59	11.8		33	2.5		59	- 2.1		59
♦  Black-throated Green Warbler	4.9		16	–			- 3.5		16	–
♦  Blue Jay	5.2	*	59	–			1.1		59	- 0.9		59
♦  Blue-headed Vireo	12.2	*	26	–			1.3		26	1.0		26
♦  Blue-winged Teal	- 2.8		55	- 5.4		34	- 1.4		55	- 6.7	*	55
♦  Bobolink	- 2.3		50	- 3.9	*	29	0.4		50	- 0.7		50
♦  Brewer's Blackbird	- 0.5		56	- 1.4		31	- 1.0		56	- 0.5		56
♦  Broad-winged Hawk	11.8		19	–			4.5		19	–
♦  Brown Thrasher	- 1.1		49	1.8		29	- 4.1	*	49	- 4.0		49
♦  Brown-headed Cowbird	- 3.5	*	61	- 4.8	*	34	- 2.1	n	61	2.8	n	61
♦  Bufflehead	18.9		19	–			17.1		19	15.1		19
♦  Bullock's/Baltimore Oriole	- 2.9	*	55	- 1.2		33	- 3.4	*	55	- 3.6		55
♦  Canada Goose	23.8	*	61	–			9.5	*	61	8.5	*	61
♦  Canada Warbler	15.2		19	–			- 0.8		19	- 5.9		19
♦  Canvasback	2.9		28	–			4.0		28	- 5.9		28
♦  Cape May Warbler	13.8	*	18	–			0.8		18	- 2.0		18
♦  Cassin's/Blue-headed Vireo	12.2	*	26	–			1.3		26	1.0		26
♦  Cedar Waxwing	- 0.3		63	- 0.8		34	- 4.1	*	63	- 3.3		63
♦  Chestnut-sided Warbler	3.5		41	–			3.4	n	41	- 0.8		41
♦  Chipping Sparrow	0.8		67	3.4		36	- 2.0	*	67	- 1.9		67
♦  Clay-colored Sparrow	- 0.6		65	- 3.0	n	35	- 0.1		65	- 1.4		65
♦  Cliff Swallow	- 3.1	*	52	4.0		32	- 5.6	*	52	- 1.8		52
♦  Common Goldeneye	8.6		24	–			6.5		24	27.4	*	24
♦  Common Grackle	- 0.5		60	- 0.2		35	0.4		60	11.0	*	60
♦  Common Loon	15.5	*	37	–			5.3		37	- 3.3		37
♦  Common Merganser	5.3	*	18	–			- 4.4		18	- 9.3		18
♦  Common Nighthawk	- 0.3		24	–			- 12.5		24	- 20.0		24
♦  Common Raven	6.3	n	62	–			3.4	*	62	4.3	*	62
♦  Common Tern	- 1.3		19	–			7.3		19	–
♦  Common Yellowthroat	1.4		64	- 1.1		35	1.9	*	64	- 0.3		64
♦  Connecticut Warbler	9.3		30	–			- 1.9		30	4.1		30
♦  Cooper's Hawk	6.8		26	–			- 1.8		26	–
♦  Dark-eyed Junco	5.9	*	22	–			- 5.2		22	- 1.2		22
♦  Double-crested Cormorant	33.7	*	33	–			6.3		33	16.7		33
♦  Downy Woodpecker	10.4	*	55	–			0.3		55	4.1		55
♦  Eastern Bluebird	10.9		36	–			- 4.4		36	- 3.2		36
♦  Eastern Kingbird	- 3.0	*	60	- 1.4		35	- 4.4	*	60	- 2.1		60
♦  Eastern Phoebe	0.9		59	2.3		35	- 1.2		59	- 1.1		59
♦  Eastern Towhee	0.5		21	–			8.6		21	- 6.3		21
♦  Eastern Wood-Pewee	4.1		45	–			- 5.3	*	45	- 6.0		45
♦  European Starling	- 1.8		53	- 1.9		30	1.5		53	7.1	*	53
♦  Evening Grosbeak	10.2	*	23	–			- 6.9		23	- 20.8		23
♦  Franklin's Gull	8.1	*	46	–			2.1		46	- 7.6		46
♦  Gadwall	3.6		34	–			- 0.5		34	0.0		34
♦  Grasshopper Sparrow	- 4.0		29	–			- 10.5		29	–
♦  Gray Catbird	- 1.2		58	- 2.5		33	1.1		58	5.0	*	58
♦  Gray Jay	12.6	*	23	–			- 1.3		23	1.3		23
♦  Gray Partridge	- 0.6		29	–			- 3.3		29	2.9		29
♦  Great Blue Heron	4.2		52	–			- 0.5		52	- 7.2		52
♦  Great Crested Flycatcher	0.1		53	- 0.3		32	- 1.0		53	3.9		53
♦  Great Horned Owl	- 3.9		41	5.1		29	- 3.6		41	- 5.5		41
♦  Green-winged Teal	6.7		46	–			5.2		46	- 5.8		46
♦  Hairy Woodpecker	2.4		60	6.6		35	- 0.3		60	- 1.2		60
♦  Hermit Thrush	15.9	*	36	–			2.0		36	- 1.4		36
♦  Herring Gull	- 3.7		23	–			- 3.6		23	- 6.8		23
♦  Hooded Merganser	9.5		17	–			0.6		17	–
♦  Horned Grebe	3.0		17	–			–			–
♦  Horned Lark	- 7.5	*	45	- 6.2		27	- 7.6	*	45	- 4.2	n	45
♦  House Finch	15.8		17	–			23.8		17	10.3		17
♦  House Sparrow	- 4.0	*	50	- 5.6	*	29	- 2.8	*	50	- 4.4	*	50
♦  House Wren	- 0.9		59	0.1		33	- 1.8	n	59	- 1.6		59
♦  Indigo Bunting	7.4		24	–			- 8.3		24	- 6.3		24
♦  Killdeer	- 4.6	*	65	- 8.1	*	36	- 2.7	*	65	- 0.9		65
♦  Lark Sparrow	20.8	*	21	–			26.1	n	21	4.1		21
♦  Le Conte's Sparrow	3.0	n	54	–			2.3		54	- 5.2		54
♦  Least Flycatcher	- 0.4		65	- 2.1		35	- 1.3		65	- 1.0		65
♦  Lesser Scaup	- 1.1		33	–			- 0.4		33	5.4		33
♦  Lesser Yellowlegs	11.1	*	22	–			38.3	*	22	15.3		22
♦  Lincoln's Sparrow	14.9	*	32	–			2.8		32	0.0		32
♦  Loggerhead Shrike	- 1.6		17	–			–			–
♦  Magnolia Warbler	12.2	n	30	–			2.2		30	3.3		30
♦  Mallard	- 1.1		67	2.1		36	- 1.1		67	- 0.5		67
♦  Marbled Godwit	2.4		47	–			- 0.6		47	2.1		47
♦  Marsh Wren	6.4		46	–			- 0.7		46	0.0		46
♦  Merlin	14.4		48	–			3.5		48	1.6		48
♦  Mountain Bluebird	- 3.7		21	–			- 13.1	*	21	–
♦  Mourning Dove	- 2.2	*	56	0.8		32	- 4.8	*	56	- 2.8	*	56
♦  Mourning Warbler	1.6		36	–			0.6		36	2.7		36
♦  Nashville Warbler	12.5	*	36	–			- 0.2		36	- 4.3	n	36
♦  Nelson's Sharp-tailed Sparrow	13.6	n	35	–			9.6	*	35	8.6		35
♦  Northern Flicker	- 2.7	*	65	- 3.5	*	36	- 1.6		65	- 0.1		65
♦  Northern Harrier	- 2.0		54	0.2		31	- 1.3		54	- 1.1		54
♦  Northern Pintail	- 3.6		40	- 3.8		28	- 3.0		40	- 4.7		40
♦  Northern Shoveler	5.5		47	–			3.4		47	- 9.0	*	47
♦  Northern Waterthrush	10.7		36	–			4.5		36	7.4		36
♦  Olive-sided Flycatcher	8.9	*	24	–			- 3.9	*	24	2.6		24
♦  Orange-crowned Warbler	13.9	*	25	–			36.3	*	25	0.6		25
♦  Orchard Oriole	16.6	*	26	–			8.6	*	26	7.9	*	26
♦  Ovenbird	1.6		51	–			1.7		51	0.6		51
♦  Palm Warbler	7.8	*	17	–			- 7.5		17	–
♦  Philadelphia Vireo	12.1		22	–			3.6		22	- 8.1		22
♦  Pied-billed Grebe	2.7		46	–			1.4		46	- 3.1		46
♦  Pileated Woodpecker	15.3	n	41	–			3.0		41	0.2		41
♦  Pine Siskin	8.7		38	–			- 0.3		38	- 4.7		38
♦  Purple Finch	9.7	*	34	–			- 2.4		34	- 0.1		34
♦  Purple Martin	3.7		33	–			- 5.5	*	33	- 14.1	*	33
♦  Red-breasted Nuthatch	17.2	*	29	–			7.3	*	29	5.5		29
♦  Red-eyed Vireo	1.9	*	65	2.0		35	1.4	n	65	0.0		65
♦  Redhead	7.3		26	–			- 2.2		26	- 0.1		26
♦  Red-headed Woodpecker	- 1.0		27	–			- 9.2		27	- 1.5		27
♦  Red-necked Grebe	12.8		19	–			3.6		19	5.3		19
♦  Red-tailed Hawk	2.9	n	62	2.5		35	- 0.2		62	1.7		62
♦  Red-winged Blackbird	- 0.4		65	- 1.7		35	1.8	n	65	5.2	*	65
♦  Ring-billed Gull	4.4		53	–			5.5	n	53	9.8		53
♦  Ring-necked Duck	14.0		38	–			1.7		38	5.8		38
♦  Rock Pigeon	- 0.6		47	–			- 3.3	n	47	- 8.3		47
♦  Rose-breasted Grosbeak	0.1		57	1.1		34	- 0.8		57	1.4		57
♦  Ruby-crowned Kinglet	12.5	*	35	–			1.4		35	0.3		35
♦  Ruby-throated Hummingbird	8.3		39	–			9.9	n	39	15.1		39
♦  Ruddy Duck	- 2.8		26	–			1.6		26	- 8.4		26
♦  Ruffed Grouse	9.4		40	–			2.4		40	2.8		40
♦  Sandhill Crane	16.2	n	40	–			- 0.6		40	5.8		40
♦  Sapsucker (3 Sphyrapicus spp.)	0.1		52	–			5.3		52	8.8	n	52
♦  Savannah Sparrow	0.9		59	- 1.4		34	- 0.4		59	- 4.1	*	59
♦  Scarlet Tanager	7.0		22	–			0.5		22	–
♦  Sedge Wren	2.7	n	62	- 3.8		35	3.7	n	62	- 2.6		62
♦  Sharp-shinned Hawk	10.0		32	–			3.9		32	–
♦  Sharp-tailed Grouse	7.1		39	–			2.4		39	12.2	*	39
♦  Short-eared Owl	- 3.0		18	–			–			–
♦  Solitary Sandpiper	8.5		16	–			–			–
♦  Song Sparrow	1.3		66	- 2.5	*	35	- 0.2		66	1.1		66
♦  Sora	1.7		62	- 4.4		36	0.0		62	- 3.2	n	62
♦  Spotted Sandpiper	4.0		43	30.1	n	32	- 9.9	*	43	- 10.4		43
♦  Sprague's Pipit	- 5.2		23	–			- 10.1		23	–
♦  Swainson's Hawk	13.9	*	35	–			2.8		35	1.0		35
♦  Swainson's Thrush	3.8		36	–			1.9		36	0.7		36
♦  Swamp Sparrow	21.4	*	45	–			7.6	*	45	1.7		45
♦  Tennessee Warbler	13.4		39	–			1.7		39	10.7		39
♦  Tree Swallow	- 1.9	*	63	- 1.3		36	- 2.6	*	63	- 1.8		63
♦  Turkey Vulture	19.2	*	17	–			18.4		17	12.2		17
♦  Upland Sandpiper	- 4.1	*	40	–			- 5.8	*	40	0.4		40
♦  Veery	- 2.7		48	–			1.2		48	- 2.2		48
♦  Vesper Sparrow	- 1.8	*	60	- 1.5		33	- 3.4	*	60	- 2.0		60
♦  Virginia Rail	10.8	*	18	–			7.6		18	–
♦  Warbling Vireo	0.2		52	0.0		31	0.2		52	- 1.7		52
♦  Western Kingbird	- 0.2		42	–			- 6.5	*	42	- 7.5	*	42
♦  Western Meadowlark	- 2.6	*	54	- 1.0		31	- 3.5	*	54	0.6		54
♦  White-breasted Nuthatch	15.4	*	44	–			4.5		44	1.6		44
♦  White-throated Sparrow	1.3		41	–			1.2		41	1.1		41
♦  White-winged Crossbill	21.9	*	19	–			- 1.6		19	- 4.9		19
♦  Wild Turkey	16.2		17	–			18.0		17	47.1		17
♦  Willet	1.7		25	–			2.7		25	- 1.6		25
♦  Wilson's Phalarope	- 2.2		27	–			8.5		27	5.8		27
♦  Wilson's Snipe	4.2	*	62	- 2.8		35	6.3	*	62	3.4		62
♦  Winter Wren	19.0	*	23	–			2.8		23	7.1	*	23
♦  Wood Duck	10.8		41	–			0.4		41	10.2		41
♦  Yellow Rail	12.8	*	17	–			30.1	n	17	–
♦  Yellow Warbler	1.9	*	67	- 0.5		36	0.5		67	- 0.8		67
♦  Yellow-bellied Flycatcher	9.6		18	–			2.9		18	4.3		18
♦  Yellow-bellied Sapsucker	0.1		52	–			5.3		52	8.8	n	52
♦  Yellow-headed Blackbird	0.5		49	5.3		28	- 2.6		49	0.2		49
♦  Yellow-rumped Warbler	15.1	*	34	–			- 3.3	*	34	- 3.3		34
♦  Yellow-throated Vireo	9.7		20	–			4.6		20	1.5		20

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