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

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

Canada Geese 2008-2010 Individual observations

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.

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.

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.

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

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

Domino, #082 and seven goslings

Domino, #082 and seven goslings

Geese #094 and 120 and eight goslings May 2009, White Marsh Mall area

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

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

Band # 1038-55- pair 075 - male 123- 074 -male 086-female 2008 chicks female May 27,30 29 5, 10, 13, 15, 19, 26, 27, 30 4 then 3 5, 10, 13, 15, 19, 26, 27, 30 June 18,20,27 8, 14 2, 7, 17,18, 20, 27 July August 17 31 10, 23 September 8, 20 11, 28 October 11 November December 14 Jan-2009 February 21 March April 5 10, 17, 23 7, 9, 10, 17, 23 1, 7,10 4 1, 7, 22 12,27 6, 12, 27 4, 12, 25 25 3 3, 11, 30 1, 7, 21 4, 12 Jan.2010 20, 23, 28 20 28

Number of times each goose was seen each month. band May 2008 6 7 8 9 10 11 12 Jan 2009 2 3 4 5 2010 Dom wierd wing O F T E N 1 074 075 076 078 082 085 086 087 088 089

Number of times each goose was seen. band May 2008 6 7 8 9 10 11 12 Jan 2009 2 3 4 5 2010 093 1 094 095 096 098 100 101 103 104 106 107 108 109

Number of times each goose was seen. Band # May 2008 6 7 8 9 10 11 12 Jan 2009 2 3 4 5 2010 110 1 111 112 114 115 117 118 119 120 121 122 123

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

Field study to estimate species population size. 1 Field study to estimate species population size 1. 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)

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

Junco Populations 1999 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 P N T B n date 61 39 22 14 8 Jan. 11 103 94 47 11 12 5 6 Jan. 16-17 185 141 53 7 2 3 23-25 80 58 30-31 91 9 Feb. 6-7

Junco Populations 2002-2003 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) P N T B n date 198 51 35 9 26 Jan. 02 19-21 75 44 12 7 5 Jan. 03 26-28 92 50 22 10 Feb.03 7-11 104 60 59 34 25 15-17

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White-throated Sparrow Populations Timonium and Cub Hill, Baltimore County, MD dates location 52 24 11 13 Jan. 20-21, 1982 Tim. 49 36 15 4 Feb. 5, 1982 39 10 8 2 Feb. 27-28, 1982 50 42 6 5 1 March 18, 1982 16 12 Dec. 12, 1982 7 Dec. 18-19, 1982 21 Jan. 11, 1983 31 9 3 Jan. 16-17, 1983 35 14 Jan. 29-31, 1986 45 29 Feb. 7-11, 2003 Cub 47 34 18 Feb. 15-17, 2003

Winter Population Summary Dark-eyed Junco 1991 2003 61 198 103 75 80 92 91 104 Mean= 84 117 White-throated Sparrow 1982 1983 1986 2003 52 16 35 45 49 24 47 49 21 50 31 50 23 35 46

Pine Siskin Banding 1982 Timonium, 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) P N T B n date 306 85 18 5 13 Feb 02 Site B 2306 186 62 57 March 26-28 Site A 2268 243 56 6 50 April 2-8

Winter Population Summary Dark-eyed Junco 1991 2003 61 198 103 75 80 92 91 104 Mean= 84 117 White-throated Sparrow 1982 1983 1986 2003 52 16 35 45 49 24 47 49 21 50 31 50 23 35 46

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