Canada Geese 2008-2010 Individual observations

1. Eastern Bird Banding Association Annual Meeting, April 9-11, 2010 Rocky Gap State Park, Flintstone, Maryland

2. Banding returns from backyard Dark-eyed Juncos to nesting Canada Geese by the mall Dr. David Thorndill, Professor of Biology Community College of Baltimore Countydthorndill@ccbcmd.eduwebpage:  http://faculty.ccbcmd.edu/~dthornd1/ 

3. Canada Geese2008-2010Individual observations

4. A study of banded Canada Geese June 28, 2007 , Larry Hindman of the MD Wildlife Division-DNR banded Canada Geese in Preston, Caroline County, MD. In May 2008 many of these geese were seen near White Marsh Mall in Baltimore County, MD, about fifty miles northwest of Preston. Geese are lured close with bread and band numbers are read directly.

6. A study of banded Canada Geese Thirty-seven geese with band number prefixes 1038-55- have been see in the White Marsh area between May 2008 and 2010. Only the last three band digits are used here. 1038-55-094 is listed as # 094, seen here.

7. One goose, called Domino, was not banded but is easily recognizes by a wing deformity. Domino is unable to fly and has often been the only goose in the pond, especially in the winter. Other geese may be seen at any of three ponds about a quarter mile apart or on grassy lawns.

8. Domino 082 2008 May O 26,27 June F 2,3,8 July T August E September 20 N 20 October 11 11 November O FTEN Domino and #082 in 2008Pairing first noticed September 20th Domino December December

9. 2009 DOMINO - 082 January-09 O FTEN 17 February 21 21 March 15 15 April 4,12,13,23,26 4,12,13 nest? May 17,23,25 17,23,25 June 1,7,10,18,22,24,28 1,7,10,18,22,24,28 July 4,14 4,14 August 27 6 gone September 4,7,12, 20 6 gone October 3, 11, 30 6 gone November 1, 7 December 4, 12, 20 Domino and #082 pair February 2009They have seven goslings in Maybut #082 and one gosling disappear in August Chicks 7 7 7 gone gone 7

10. Domino, #082 and seven goslings

11. Domino, #082 and seven goslings

13. Geese #094 and 120 and eight goslingsMay 2009, White Marsh Mall area

14. Leg band of Goose 1038-55094Banded June 26, 2007, in Preston, Caroline County

15. 6 5 094 - male 120 2008 chicks 6 6 May 10,13,15,17,19 10,13,15,17,19 June 5,7,14, 18,20 5,7,14, 20 July August 31 September 11, 28 11, 28 October November December 14 January-09 February 15, 21 15, 21 March April May 7. 17,23 7, 17,23 June 1,7, 18,22 1,7, 18 July August 27 September 4,12, 19, 25 4, 12, 20 October 3, 11, 30 3, 11, 30 November 1, 7, 21 1, 7, 21 December 4 4,23 Geese 094 and 120had broods in 2008 and 2009 8 8 8 8

17. Number of times each goose was seen each month.

18. Number of times each goose was seen.

19. Number of times each goose was seen.

20. Field study to estimate species population size Capture-Release-Capture Method • Best Conditions: a closed population • Large population • Birds mix freely • No animals born • No animals die • No migration into or from out of the study area • All animals have an equal chance of being captured and recaptured

21. Field study to estimate species population size1. Band birds under best conditions 2. Recapture banded and unbanded birds Then estimated population size is: P = N x T B P = Total population size N = number banded before recapture period B = recaptured that are banded n = recaptured that are unbanded T = B + n = total birds caught during the recapture date(s)

22. Acceptable conditions for population estimates of Juncos and White-throated Sparrows • Winter populations seem fairly stable from December 1 until March 1 • Banded returns from earlier years are counted as unbanded for their first capture of the season • Recapture period may be from 1-3 days and should have at least 5 recaptured banded birds • Individual birds are only counted once during the recapture period • Nets and traps are near winter feeding areas

23. Junco Populations1999 Cub Hill, Baltimore County, MD population size: P = N x T B P = Total population size N = number banded before recapture period B = recaptured that are banded n = recaptured that are unbanded T = B + n = total birds caught during the recapture date(s) RED- hypothetical calculations if one more banded bird were recaptured

24. Junco Populations2002-2003 Cub Hill, Baltimore County, MD population size: P = N x T B P = Total population size N = number banded before recapture period B = recaptured that are banded n = recaptured that are unbanded T = B + n = total birds caught during the recapture date(s)

25. THE THE END END

26. White-throated Sparrow PopulationsTimonium and Cub Hill, Baltimore County, MD

28. Dark-eyed Junco 19912003 61 198 103 75 80 92 91 104 Mean= 84 117 White-throated Sparrow 1982198319862003 52 16 35 45 49 24 47 49 21 50 31 50 23 35 46 Winter Population Summary

29. Pine Siskin Banding 1982Timonium, Baltimore County, MD population size: P = N x T B P = Total population size N = number banded before recapture period B = recaptured that are banded n = recaptured that are unbanded T = B + n = total birds caught during the recapture date(s)

30. Dark-eyed Junco 19912003 61 198 103 75 80 92 91 104 Mean= 84 117 White-throated Sparrow 1982198319862003 52 16 35 45 49 24 47 49 21 50 31 50 23 35 46 Winter Population Summary

33. THE THE END END