Biggest Week in American Birding Warbler Cheat Sheet

This data is taken from eBird, a Citizen Science project to collect birders’ checklist data from around the world for use by researchers and scientists.  Data in this chart was accessed on 3/18/2014 from ebird.org.  The data is for all of the month of May [only] and is for all years (1900-2013).  The cheat sheet is for Northwest Ohio including the counties of Erie, Ottawa, and Lucas.  Even though this chart covers the whole month of May, it can still be used as a guideline for Biggest Week this year which occurs from May 6-15, 2014.  Check out the main festival site here: http://www.biggestweekinamericanbirding.com/.

The first column is taxonomical sequence.  The second column is a difficulty rank based on the highest number of individual birds per checklist for a specific species for May in the Biggest Week area.  The lower the difficulty number, the easier the bird is to see (more birds per checklist).  Likewise, the higher the difficulty number, the harder that species is to see.  The third column is the week in May in which that species peaks–reaches its maximum value for birds per checklist. Column 4 is the species common name.  Column 5 is the actual maximum value of birds per checklist that a species achieves in May in the 3-county area.  Column 6 is like column 3 but is specific to actual day (as opposed to week of the month).  The last column is the average number of checklists submitted during May in the 3-county area to see 1 (one) individual bird.  This is calculated by taking the reciprocal of the peak value of abundance (birds per checklist).  For example, Ovenbird reaches a peak of 0.480 birds per checklist.  So 1 divided by 0.480 equals 2.0833 [checklists to see 1 bird].  But since a fraction remains I add 1 to it to get to 3 checklists to see 1 bird.  Got it?  Good.

Tax Difficulty Week Species

Highest # birds/chklst

Peak Abundance Day

Avg # Chklsts to see 1

1

20

2

Ovenbird

0.480

13-May

3

2

30

1

Worm-eating Warbler

0.098

5-May

11

3

35

2

Louisiana Waterthrush

0.057

13-May

18

4

23

2

Northern Waterthrush

0.373

13-May

3

5

25

1

Blue-winged Warbler

0.189

1-May

6

6

26

2

Golden-winged Warbler

0.156

10-May

7

7

15

2

Black-and-white Warbler

0.785

13-May

2

8

19

3

Prothonotary Warbler

0.500

21-May

2

9

17

3

Tennessee Warbler

0.643

19-May

2

10

31

1

Orange-crowned Warbler

0.083

1-May

12

11

9

1

Nashville Warbler

1.251

2-May

1

12

32

4

Connecticut Warbler

0.075

22-May

14

13

22

3

Mourning Warbler

0.395

19-May

3

14

33

1

Kentucky Warbler

0.067

2-May

15

15

6

3

Common Yellowthroat

1.787

19-May

1

16

24

1

Hooded Warbler

0.203

4-May

5

17

4

4

American Redstart

3.538

23-May

1

18

36

2

Kirtland’s Warbler

0.041

14-May

25

19

21

2

Cape May Warbler

0.469

12-May

3

20

27

1

Cerulean Warbler

0.125

4-May

8

21

18

3

Northern Parula

0.614

15-May

2

22

5

3

Magnolia Warbler

3.096

19-May

1

23

11

2

Bay-breasted Warbler

1.002

14-May

1

24

16

2

Blackburnian Warbler

0.723

13-May

2

25

2

3

Yellow Warbler

4.654

20-May

1

26

8

3

Chestnut-sided Warbler

1.450

19-May

1

27

10

4

Blackpoll Warbler

1.239

23-May

1

28

14

3

Black-throated Blue Warbler

0.940

18-May

2

29

3

1

Palm Warbler

4.177

1-May

1

30

28

1

Pine Warbler

0.110

1-May

10

31

1

1

Yellow-rumped Warbler

15.177

1-May

1

32

37

2

Yellow-throated Warbler

0.020

10-May

50

33

34

1

Prairie Warbler

0.059

2-May

17

34

7

1

Black-throated Green Warbler

1.563

1-May

1

35

12

4

Canada Warbler

0.970

22-May

1

36

13

4

Wilson’s Warbler

0.970

22-May

1

37

29

4

Yellow-breasted Chat

0.105

31-May

10

 

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