Thunder Cape Bird Observatory Species Coverage

Species Coverage at
Thunder Cape Bird Observatory

Index

The table below lists average number of each species counted (DET) and banded (Band) per season at Thunder Cape Bird Observatory from 1991-1999. It only includes species with a minimum of at least 10 birds per year, on at least 5 separate days. A dash indicates the species did not meet the minimum criterion for that season. Species are sorted by priority of greatest need for migration monitoring, with ‘A’ the highest priority.

Migration
Trends

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		Spring		Fall
Species	Priority	DET	Band	DET	Band
Alder Flycatcher	A	28.6	2.9	108.8	8.8
American Pipit	A	-	-	327.9	3.6
Bay-breasted Warbler	A	47.3	16.5	63.3	25.7
Blackpoll Warbler	A	-	-	124.6	53.2
Cape May Warbler	A	534.1	118.3	326.9	75.7
Gray-cheeked Thrush	A	-	-	20.8	15.3
Lincoln's Sparrow	A	21.3	12.3	70.1	34.7
Magnolia Warbler	A	196.8	57.5	248.4	96.3
Northern Waterthrush	A	12.1	6.6	96.2	53.2
Orange-crowned Warbler	A	18.5	7.9	35.2	19.9
Savannah Sparrow	A	61.1	25.3	334.1	97.1
Swainson's Thrush	A	76	20.9	328.9	148.4
Tennessee Warbler	A	323.8	112.3	687	144.7
Wilson's Warbler	A	36.9	15.9	35	18.6
Yellow-bellied Flycatcher	A	23.3	12.8	47.3	29.9
Yellow-bellied Sapsucker	A	-	-	24.9	3.6
American Tree Sparrow	B	-	-	179.6	55.2
Bohemian Waxwing	B	-	-	247.3	1.4
Boreal Chickadee	B	-	-	130.8	10.4
Common Redpoll	B	-	-	3558.1	19.4
Harris' Sparrow	B	-	-	13.4	3.8
Lapland Longspur	B	-	-	223.4	13
Myrtle Warbler	B	778.3	82.8	1868.3	204
Northern Shrike	B	-	-	10	1.2
Pine Grosbeak	B	-	-	42.3	1.2
Ruby-crowned Kinglet	B	89.6	17	369.8	77.1
Rusty Blackbird	B	-	-	774.9	5.6
Snow Bunting	B	-	-	222.6	19.4
Swamp Sparrow	B	28.3	20.6	57.3	28.8
Unidentified Dark-eyed Junco	B	296.8	83	3140.4	445.9
Western Palm Warbler	B	145.8	38.4	1055	228.2
White-crowned Sparrow	B	22.3	7.1	241.1	43.8
White-throated Sparrow	B	178.8	40.9	188.9	39.1
White-winged Crossbill	B	-	-	1255.9	0.6
American Redstart	C	254	73.5	660.4	226.8
Barn Swallow	C	25.1	0	80.1	0
Black-and-white Warbler	C	85.3	24.4	135.1	61.4
Black-throated Green Warbler	C	168.6	19.4	182.4	66.8
Canada Warbler	C	53.6	25.8	86.6	48.6
Chipping Sparrow	C	1885.8	373	704.9	79.9
Clay-colored Sparrow	C	17.4	7.3	-	-
Common Nighthawk	C	-	-	56.2	3.1
Common Yellowthroat	C	47.3	19.1	47	15.1
Eastern Kingbird	C	42.3	0.1	51.9	0.3
Least Flycatcher	C	26.5	9.9	36.8	21.9
Mourning Warbler	C	17.1	9.9	56.9	30.7
Olive-sided Flycatcher	C	12.3	1.5	15.2	0.2
Ovenbird	C	47.4	17.3	39.4	26.1
Philadelphia Vireo	C	14.6	5.1	14	10.2
Red-eyed Vireo	C	50.6	14.5	155	68.3
Solitary Vireo	C	14	1.5	41.4	24.1
Tree Swallow	C	214.9	0.4	28.4	0
Yellow Warbler	C	35	10.9	27.6	9.9
American Crow	D	76.8	0.1	236.7	0.1
American Robin	D	97.4	1.4	1752.8	7.1
Black-capped Chickadee	D	15.6	1.3	3844.1	456.4
Brown Creeper	D	13.5	2.1	132.7	59.6
Cedar Waxwing	D	1345.8	8.1	3187.6	60.3
Common Grackle	D	211.9	9.4	436.3	5.8
Downy Woodpecker	D	11.6	0.1	1132.9	109.6
European Starling	D	28	0.1	-	-
Golden-crowned Kinglet	D	101.8	3.5	737.3	76.9
Hairy Woodpecker	D	-	-	110.8	8.4
Hermit Thrush	D	-	-	28	13.6
Horned Lark	D	-	-	182.4	8.8
Northern Flicker	D	115.5	11.9	152	14
Pine Siskin	D	4586.8	170.4	2940.3	7
Purple Finch	D	101.9	26.5	399.9	16.4
Red-breasted Nuthatch	D	79.1	7.9	1195.6	125.7
Red-winged Blackbird	D	82.5	5.6	424.4	3.3
Song Sparrow	D	240.5	25.6	390.9	59.4
Winter Wren	D	29.6	0.4	74.8	8.7
Baltimore Oriole	E	18.4	2.6	-	-
Black-throated Blue Warbler	E	29.3	8.3	24.4	14.3
Blackburnian Warbler	E	92.4	18.9	78.3	25.3
Chestnut-sided Warbler	E	131.3	32.4	53.7	24.4
Eastern Wood-Pewee	E	13.1	2.4	-	-
Indigo Bunting	E	11.5	2.9	-	-
Nashville Warbler	E	201.3	69.3	360.9	129.2
Northern Parula	E	26.4	2.5	10	5
Rose-breasted Grosbeak	E	77.9	18.9	15.2	5.1
Ruby-throated Hummingbird	E	84.3	2.8	74.6	1.1
Scarlet Tanager	E	10.9	0.6	-	-
American Goldfinch	F	81.1	10.5	239.6	6.1
Blue Jay	F	741.5	78.6	1254.9	26.9
Brown-headed Cowbird	F	27.5	6.3	20	0.6
Eastern Bluebird	F	33.1	1.5	110.7	1.1
Evening Grosbeak	F	738.3	59.1	862.8	22.9
Mourning Dove	F	17.5	3.1	-	-
Black-backed Woodpecker	X	-	-	51.2	4.8
Common Raven	X	36.3	0	501.1	0
Gray Jay	X	-	-	35.6	9.7
Pileated Woodpecker	X	-	-	27.3	3.9
Red Crossbill	X	-	-	112.7	0

Priority Codes

The highest priority species for migration monitoring are those species that breed mainly in areas where they are not adequately covered by breeding ground surveys such as the Breeding Bird Survey. A secondary consideration is whether the species winter mainly south of the United States, and hence cannot be surveyed by winter surveys such as the Christmas Bird Count. On this basis, species in categories A-D are all important for migration monitoring, with species in category A the highest priority. The categories are defined as follows:

A. Species with <50% of North American (Canada & U.S. only) breeding range covered by BBS, and <60% of their winter range in U.S. and Canada.

B. Species with <50% of North American breeding range covered by BBS, but >60% of their winter range in U.S. and Canada.

C. Species with <60% of their Canadian & Alaskan breeding range (but >50% of North American range) covered by BBS, and <60% of their winter range in U.S. and Canada.

D. Species with <60% of their Canadian & Alaskan breeding range (but >50% of North American range) covered by BBS, but >60% of their winter range in U.S. and Canada.

E. Species with >60% of both their Canadian and North American breeding range covered by BBS, and <60% of their winter range in U.S. and Canada.

F. Species with >60% of both their Canadian and North American breeding range covered by BBS, and >60% of their winter range in U.S. and Canada.

X. Resident landbirds that are considered to be unsuitable candidates for migration monitoring.

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Species Coverage at Thunder Cape Bird Observatory

Species Coverage at
Thunder Cape Bird Observatory