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Hawk Mountain. Rachel Carson at Hawk Mountain. Leading Lines. Geographic Trends Follow the mountain ridges Follow the rivers Follow the shore line Weather Conditions Cold fronts or storms Favorable tail-wind Updrafts and thermals. Hawk Mountain. Current Count. WEATHER :

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Hawk Mountain


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    1. Hawk Mountain

    2. RachelCarson at Hawk Mountain

    3. Leading Lines • Geographic Trends • Follow the mountain ridges • Follow the rivers • Follow the shore line • Weather Conditions • Cold fronts or storms • Favorable tail-wind • Updrafts and thermals

    4. Hawk Mountain • Current Count

    5. WEATHER : Clear skies, with temperatures in the low 70s Daily Count for 9/20/2010 MIGRATION SEASONCOUNT FROM 7/31/2010 BLACK VULTURE 0 22 TURKEY VULTURE 0 63 NORTHERN GOSHAWK 0 0 SHARP-SHINNED HAWK 32 605 COOPER'S HAWK 9 86 UNIDENTIFIED ACCIPITER 1 11 RED-TAILED HAWK 6 203 RED-SHOULDERED HAWK 0 8 BROAD-WINGED HAWK 96 4818 ROUGH-LEGGED HAWK 0 0 UNIDENTIFIED BUTEO 1 17 GOLDEN EAGLE 0 0 BALD EAGLE 6 233 UNIDENTIFIED EAGLE 0 0 NORTHERN HARRIER 2 35 OSPREY 5 370 PEREGRINE FALCON 0 3 MERLIN 3 46 AMERICAN KESTREL 12 240 UNIDENTIFIED FALCON 0 2 UNIDENTIFIED RAPTOR 0 16 OTHER RAPTOR 0 1 DAILY / SEASON TOTAL 173 6779

    6. Best dates to see raptorsNumber represent the percent probability. Based on sixty years of data Species Aug.15-30 Sept.1-14 Sept.15-30 Oct.1-14 Oct.15-31 Nov.1-14 Nov.15-30 Dec.1-14 Osprey 57 87 89 73 29 4 1 <1 Bald Eagle 40 52 30 14 10 15 18 17 Northern Harrier 49 76 79 83 86 77 42 21 Sharp-shinned Hawk 41 84 98 98 96 79 41 11 Cooper's Hawk 12 32 66 85 72 45 17 13 Goshawk 2 2 7 20 36 46 50 33 Red-shouldered Hawk 3 6 18 63 83 73 45 15 Broad-winged Hawk 87 94 94 42 4 <1 <<1 0 Red-tailed Hawk 39 51 66 88 96 96 88 79 Rough-legged Hawk 0 0 0 3 12 21 18 21 Golden Eagle 0 3 10 27 45 50 42 26 American Kestrel 68 77 77 74 40 8 1 0 Merlin 3 8 20 42 28 5 1 <1 Peregrine Falcon 4 10 22 44 19 6 3 <1 # of Poss. species 12 13 13 14 14 14 14 12

    7. Raptor Count Highs, Lows, Averages (by species) 1934-2001: Species Overall Average Ten Year Average Maximum Flight Year of Maximum Osprey 374 575 872 1990 Bald Eagle 56 118 167 1999 Northern Harrier 228 243 475 1980 Sharp-shinned Hawk 4,372 4,948 10,612 1977 Cooper's Hawk 337 739 1,118 1998 Northern Goshawk 71 78 347 1972 Red-shouldered Hawk 274 293 468 1958 Broad-winged Hawk 8,164 6,400 29,519 1978 Red-tailed Hawk 3,302 3,704 6,208 1939 Rough-legged Hawk 9 6 31 1961 Golden Eagle 52 94 144 1998 American Kestrel 389 611 839 1989 Merlin 44 127 176 2001 Peregrine Falcon 25 43 60 1997 Turkey Vulture 92 206 367 1999 Black Vulture 10 46 80 1999 All raptors 17,925 18,413 40,698 1978

    8. http://www.hawkmountain.org/index.php?pr=Home_Page