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|
Raptor-Sightings In The Marin Headlands During
Autumn*
|
||||
|
2003 Raptor Rate
|
Average Raptor Rate
|
2003 Raptor Sightings
|
Average Raptor Sightings
|
|
|
(Hawks per Hour)
|
1993-2002
|
1993-2002
|
||
| Hours |
490.5
|
522
|
||
| Turkey Vulture |
21.99
|
15.45
|
10786
|
8066
|
| Osprey |
0.27
|
0.17
|
133
|
87
|
| Mississippi Kite |
<.01
|
0
|
1
|
0
|
| White-tailed Kite |
0.13
|
0.1
|
63
|
53
|
| Bald Eagle |
<.01
|
<.01
|
4
|
0
|
| Northern Harrier |
0.72
|
1.48
|
352
|
773
|
| Sharp-shinned Hawk |
10.62
|
7.9
|
5208
|
4122
|
| Cooper's Hawk |
4.11
|
4.58
|
2018
|
2389
|
| Northern Goshawk |
<.01
|
<.01
|
1
|
2
|
| Red-shouldered Hawk |
0.59
|
0.61
|
288
|
318
|
| Broad-winged Hawk |
0.25
|
0.21
|
123
|
112
|
| Swainson's Hawk |
0.02
|
<.01
|
8
|
4
|
| Red-tailed Hawk |
14.24
|
17.07
|
6986
|
8911
|
| Ferruginous Hawk |
0.03
|
0.04
|
14
|
21
|
| Rough-legged Hawk |
<.01
|
0.01
|
1
|
8
|
| Golden Eagle |
0.03
|
0.04
|
14
|
19
|
| American Kestrel |
1.42
|
1.15
|
694
|
602
|
| Merlin |
0.35
|
0.28
|
170
|
145
|
| Peregrine Falcon |
0.45
|
0.22
|
220
|
114
|
| Prairie Falcon |
0.02
|
<0.01
|
12
|
5
|
| Unidentified |
2.51
|
3.46
|
1233
|
1804
|
| Total |
57.76
|
52.79
|
28329
|
27555
|
| *Not to be cited except by permission of the GGRO. | ||||
| Data compiled by Jeff Birek and Heather Lannie | ||||
Contact the GGRO:
Mail:
Golden Gate Raptor Observatory
Building 201, Fort Mason
San Francisco, CA 94123
Phone:
(415) 331-0730
E-mail address:
ggro@parksconservancy.org
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