Bird BANDING AND BAND ENCOUNTER DATA FOR American Kestrels · 2017-05-12 · Bruce Peterjohn and...
Transcript of Bird BANDING AND BAND ENCOUNTER DATA FOR American Kestrels · 2017-05-12 · Bruce Peterjohn and...
Bruce Peterjohn and Elaine Nakash
USGS Bird Banding Laboratory
Patuxent Wildlife Research Center
Laurel, MD
BIRD BANDING AND BAND ENCOUNTER DATA FOR AMERICAN KESTRELS
10,700
5,965
0
2,000
4,000
6,000
8,000
10,000
12,000
1960
1963
1966
1969
1972
1975
1978
1981
1984
1987
1990
1993
1996
1999
2002
2005
2008
2011
2014
American Kestrel bandings by year (1960-2016) 325,000 records
AGE #bandings AHY 74,114 ASY 3,349 ATY 15 HY 80,566 L 137,255 SY 6,868 TY 19 U 23,712
AMERICAN KESTREL BANDING RECORDS BY AGE CLASS
AMERICAN KESTREL BANDING RECORDS BY AGE CLASS
0
10,000
20,000
30,000
40,000
50,000
60,000
1960-1969 1970-1979 1980-1989 1990-1999 2000-2009 2010-2016
Nestlings vs. other ages
Local all other ages
1,255
737 3,271 9,288
112 3,215
4,838
4,407 3,973 7,624
34,163
21,462 13,812
14,355
19,293
18,508
2,223 2,490
761 402
1,821
996
2,387
2,621
1,576 677
191
15,373
13,280
1,658
140
575 362 236 1,808
1,544 1,053 1,446
888
4,636
5,893
9,728
693 446
17
19
14,784 561
8,219 NH 840 VT 1,608 MA 9,110 RI 175 CT 6,853 NJ 28,350 DE 527 MD 5,763 DC 14
BBL banding records for American Kestrels by state/province
10-minute blocks with 10+ American Kestrels banded
3,686 (1981-2015) Hawk Mountain, PA
1,525 (1974-2016) Hawk Ridge , MN
2,192 (1957-2016) Linwood Springs, WI
24,546 (1972-2015) Hawk Cliff, ON
1,529 (1976-2016) Flying M Ranch, CA
10,170 (1965-2016) Cape May, NJ
1,339 (1984-2015) Golden Gate/Marin, CA
3,834 (1981-2016) Hawkwatch, Int., NV
5,309 (1987-2015) Boise State Univ., ID
3,653 (1983-2002) Bridgeport, WA
4,630 (1981-2015)
Permits banding 1000+ American Kestrels
Winter (Dec.-Feb.) banding records for American Kestrels
N = 38,189 banded
N = 28,228 banded
Spring (March-May) banding records for American Kestrels
Summer (June-Aug.) banding records for American Kestrels
N = 179,269 banded
N = 80,363 banded
Fall (Sept.- Nov.) banding records for American Kestrels
SUMMARY OF BBL BANDING RECORDS FOR AMERICAN KESTRELS
• Large dataset available to inform conservation • Explore potential to estimate survivorship from
banded “local” kestrels in nest boxes • What information can be gleaned from migration
banding? • Data gaps: Northern Canada/Alaska, Great Plains,
southeast US • Winter banding, especially in southern USA
185
020406080
100120140160180200
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
American Kestrel encounters by year (1960-2016)
5,300 records
102
17
65
65
103 111
82
91
121
51 122
90
172
99
62
76
46
17 20
289
414 318
300
232
411
278
223
10 14
6
6
9
6
4 2
24
33
21
31 24
33
24 23 47
2
10
21
23 40
17
NH 31 VT 27 MA 181 RI 11 CT 78 NJ 334 DE 32 MD 176 DC 1
BBL encounter records for American Kestrel by state/province
N = 144
American Kestrels banded in winter and recovered in summer
N = 749
American Kestrels banded in summer and recovered in winter
American Kestrels banded in summer and recovered in winter
American Kestrels banded in summer and recovered in winter
Summer banded American Kestrels, all encounters
SUMMARY OF BBL ENCOUNTER RECORDS FOR AMERICAN KESTRELS
• Suggests 4 major populations across North America • Migratory and resident components to each • Additional analyses may reveal additional
population structure • Southeastern US is important wintering area for
populations east of Rockies • Many grassland birds declining in this region
• Mexico is important wintering area for western population