Species Coverage at
Ruthven, HBO

 

Index

HBO 
Web Site

Explanation 
of  DET s

 

This table presents a summary of the mean number of birds recorded by daily estimated totals (DET) (1999 only) and mean number of birds banded in each season at Ruthven (Haldimand Bird Observatory) from 1998-1999. Cells that contain a dash indicate that the species did not meet the minimum criteria in that season. This table only includes species for which an average of at least 10 individuals were recorded per season per year, on an average of at least 5 days.  Species are sorted by priority of greatest need for migration monitoring, with ‘A’ the highest priority.

Migration
Trends

Return to 
Previous Page

Return to
CMMN 
Main Page

Return to 
BSC 
Main Page

 

 

Spring

Fall

Species

Priority

Mean DET

Mean Band

Mean DET

Mean Band

Blackpoll Warbler

A

102.5

14

-

-

Gray-cheeked Thrush

A

24

36

-

-

Magnolia Warbler

A

167

78

70

64.3

Savannah Sparrow

A

-

-

28

0.3

Swainson's Thrush

A

53

42

10.5

51.8

Tennessee Warbler

A

16

12

-

-

Yellow-bellied Flycatcher

A

11.5

17

-

-

Yellow-bellied Sapsucker

A

16

2

-

-

American Tree Sparrow

B

204.5

73

141

9.3

Fox Sparrow

B

10.5

5

-

-

Myrtle Warbler

B

1338.5

127

188

86

Ruby-crowned Kinglet

B

344

167

232.5

97

Rusty Blackbird

B

1247

0

-

-

Swamp Sparrow

B

21

23

25.5

32.5

Unidentified Dark-eyed Junco

B

1087

118

597.5

84.5

White-crowned Sparrow

B

211.5

-

25.5

11

White-throated Sparrow

B

749

44

391

137

American Redstart

C

50.5

40

14

13

Bank Swallow

C

838.5

0

199.5

0

Barn Swallow

C

201

0

57

0

Black-and-white Warbler

C

25.5

14

16

8

Black-throated Green Warbler

C

21

5

13

2.5

Canada Warbler

C

10.5

13

-

-

Chipping Sparrow

C

388.5

4

650.5

3

Common Yellowthroat

C

115.5

27

130.5

40.5

Eastern Kingbird

C

50.5

0

10.5

0

Least Flycatcher

C

33.5

8

37

14.3

Ovenbird

C

46

37

14.5

47.3

Philadelphia Vireo

C

20.5

0

-

-

Red-eyed Vireo

C

177

8

33.5

2.3

Tree Swallow

C

778.5

0

884

0

Warbling Vireo

C

102.5

1

58

1.3

Yellow Warbler

C

47.5

59

484

33

American Crow

D

505.5

0

294.5

0

American Robin

D

1976.5

41

1040.5

57

Belted Kingfisher

D

74.5

0

46.5

0

Black-capped Chickadee

D

1367

182

651.5

11.3

Brown Creeper

D

102.5

25

-

-

Cedar Waxwing

D

1932.5

19

322

2.8

Common Grackle

D

1134

3

527.5

9

Downy Woodpecker

D

523

17

379.5

1.3

Eastern Phoebe

D

62.5

4

170

1.3

European Starling

D

8034.5

0

1564

1

Golden-crowned Kinglet

D

352

368

131

99.8

Hairy Woodpecker

D

39

2

30

0.3

Hermit Thrush

D

107

35

21.5

60.3

Horned Lark

D

12.5

0

-

-

Northern Flicker

D

356

2

172.5

5

Red-breasted Nuthatch

D

22.5

12

-

-

Red-winged Blackbird

D

3186.5

2

1188.5

20.3

Song Sparrow

D

1547

193

2534.5

55.3

Winter Wren

D

16

10

-

-

Baltimore Oriole

E

148.5

15

333.5

13.5

Black-billed Cuckoo

E

-

-

17

0.3

Black-throated Blue Warbler

E

19

25

12

12

Blackburnian Warbler

E

17

1

-

-

Blue-gray Gnatcatcher

E

209

0

111

0

Blue-winged Warbler

E

13.5

2

20

1

Bobolink

E

122

0

49.5

0

Chestnut-sided Warbler

E

33.5

6

11.5

5.3

Chimney Swift

E

26

0

14

0

Eastern Wood-Pewee

E

314

4

62

2.3

Gray Catbird

E

551.5

42

367.5

43.5

Great Crested Flycatcher

E

50.5

1

65.5

0.3

House Wren

E

357.5

20

321.5

10.5

Indigo Bunting

E

38

4

99.5

2.3

Nashville Warbler

E

45

48

33

12.8

Northern Rough-winged Swallow

E

196.5

0

63.5

0.5

Rose-breasted Grosbeak

E

110.5

23

255

3.8

Ruby-throated Hummingbird

E

41.5

0

23.5

0

Scarlet Tanager

E

11

1

-

-

Veery

E

13.5

11

16.5

35.8

Wood Thrush

E

52

3

98.5

20.3

Yellow-billed Cuckoo

E

-

-

11.5

0

Yellow-throated Vireo

E

46.5

-

43

0

American Goldfinch

F

1353.5

16

849

21.3

Blue Jay

F

1012.5

34

450

7

Brown Thrasher

F

-

-

25.5

4.3

Brown-headed Cowbird

F

11.5

2

722.5

18

Eastern Bluebird

F

343

0

30

-

Eastern Meadowlark

F

-

-

38

0

Eastern Towhee

F

-

-

14

0.5

Field Sparrow

F

-

-

37.5

4

House Finch

F

1140.5

8

429

0

Mourning Dove

F

631

3

674

4.8

House Sparrow

X

20.5

5

38.5

0

Northern Cardinal

X

655.5

22

459

9.5

Red-bellied Woodpecker

X

145

0

223.5

0.3

White-breasted Nuthatch

X

483

9

368.5

0.5

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.

 
 

Return to Top of Page
Return to Previous Page

The Organization  International Programs  National Programs  Regional Programs  
Long Point Bird Observatory Programs  Join BSC  Web Site Map