Hawk Migration Studies by Southeastern Michigan Raptor Research at the Detroit River Mouth: A Basic Look
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1 Hawk Migration Studies by Southeastern Michigan Raptor Research at the Detroit River Mouth: A Basic Look Paul Cypher Southeastern Michigan Raptor Research
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4 1983: Started as a volunteerstaffed hawkwatch based at Lake Erie Metropark using multiple count stites (known as Lake Erie Metropark Hawkwatch); coordinated by Tim Smart 1990: Coverage more consistent; First season w/100,000+ birds
5 1994:435,000 total birds 1996: 500+ hours of observation 1998:Obtained 501(c)3 status 2000: Hired first paid counter (funding from MDNR) 2001: Began receiving funding from Detroit Edison/ DTE Energy 2003: Recorded 3 millionth bird 2003: Documented 23 rd species
6 Michigan, United States Grosse Ile, Michigan Ontario, Canada HBMO Holiday Beach Conservation Area Lake Erie
7 Michigan, United States Grosse Ile, Michigan Ontario, Canada SMRR Lake Erie Metropark Pointe Mouillee SGA 2 miles HBMO Holiday Beach Conservation Area Lake Erie
8 Michigan, United States Grosse Ile, Michigan Ontario, Canada SMRR Lake Erie Metropark Pointe Mouillee SGA Main Count Site 75% of hours HBMO Holiday Beach Conservation Area Lake Erie
9 Michigan, United States Grosse Ile, Michigan Ontario, Canada SMRR Lake Erie Metropark Pointe Mouillee SGA Secondary Count Site 25% of hours (used on north winds) HBMO Holiday Beach Conservation Area Lake Erie
10 Michigan, United States Grosse Ile, Michigan Ontario, Canada SMRR Lake Erie Metropark Pointe Mouillee SGA 8 miles HBMO Holiday Beach Conservation Area Lake Erie
11 Factors Influencing Migration Geography: Landform funnel effect Wind: Speed and Direction Cloud cover, barometric pressure, etc. Flight Preferences of individual species Water: Shorelines and Islands Altitude: High (Canada) vs. Low (Michigan)
12 8:00AM
13 10:00AM
14
15
16
17 N
18 N
19 N
20 Factors Influencing Migration Geography: Landform funnel effect Wind: Speed and Direction Cloud cover, barometric pressure, etc. Flight Preferences of individual species Water: Shorelines and Islands Altitude: High (Canada) vs. Low (Michigan)
21 SMRR Season Averages ( ) Turkey Vulture Cathartes aura 32,160 Osprey Pandion haliaetus 140 Bald Eagle Haliaeetus leucocephalus 170 Northern Harrier Circus cyaneus 802 Sharp-shinned Hawk Accipiter striatus 9,449 Cooper s Hawk Accipiter cooperii 619 Northern Goshawk Accipiter gentilis 34 Red-shouldered Hawk Buteo lineatus 792 Broad-winged Hawk Buteo platypterus 183,895 Swainson s Hawk Buteo swainsoni 8 Red-tailed Hawk Buteo jamaicensis 7,414 Rough-legged Hawk Buteo lagopus 71 Golden Eagle Aquila chrysaetos 111 American Kestrel Falco spaverius 1,739 Merlin Falco columbarius 50 Peregrine Falcon Falco peregrinus 51
22 Red-tailed Hawk
23 Broad-winged Hawk
24 Rough-legged Hawk
25 Swainson s Hawk
26 SMRR Season Averages ( ) Turkey Vulture Cathartes aura 32,160 Osprey Pandion haliaetus 140 Bald Eagle Haliaeetus leucocephalus 170 Northern Harrier Circus cyaneus 802 Sharp-shinned Hawk Accipiter striatus 9,449 Cooper s Hawk Accipiter cooperii 619 Northern Goshawk Accipiter gentilis 34 Red-shouldered Hawk Buteo lineatus 792 Broad-winged Hawk Buteo platypterus 183,895 Swainson s Hawk Buteo swainsoni 8 Red-tailed Hawk Buteo jamaicensis 7,414 Rough-legged Hawk Buteo lagopus 71 Golden Eagle Aquila chrysaetos 111 American Kestrel Falco spaverius 1,739 Merlin Falco columbarius 50 Peregrine Falcon Falco peregrinus 51
27 Golden Eagle
28 SMRR Season Averages ( ) Turkey Vulture Cathartes aura 32,160 Osprey Pandion haliaetus 140 Bald Eagle Haliaeetus leucocephalus 170 Northern Harrier Circus cyaneus 802 Sharp-shinned Hawk Accipiter striatus 9,449 Cooper s Hawk Accipiter cooperii 619 Northern Goshawk Accipiter gentilis 34 Red-shouldered Hawk Buteo lineatus 792 Broad-winged Hawk Buteo platypterus 183,895 Swainson s Hawk Buteo swainsoni 8 Red-tailed Hawk Buteo jamaicensis 7,414 Rough-legged Hawk Buteo lagopus 71 Golden Eagle Aquila chrysaetos 111 American Kestrel Falco spaverius 1,739 Merlin Falco columbarius 50 Peregrine Falcon Falco peregrinus 51
29 Osprey
30 Bald Eagle
31 Peregrine Falcon
32 SMRR Season Averages ( ) Turkey Vulture Cathartes aura 32,160 Osprey Pandion haliaetus 140 Bald Eagle Haliaeetus leucocephalus 170 Northern Harrier Circus cyaneus 802 Sharp-shinned Hawk Accipiter striatus 9,449 Cooper s Hawk Accipiter cooperii 619 Northern Goshawk Accipiter gentilis 34 Red-shouldered Hawk Buteo lineatus 792 Broad-winged Hawk Buteo platypterus 183,895 Swainson s Hawk Buteo swainsoni 8 Red-tailed Hawk Buteo jamaicensis 7,414 Rough-legged Hawk Buteo lagopus 71 Golden Eagle Aquila chrysaetos 111 American Kestrel Falco spaverius 1,739 Merlin Falco columbarius 50 Peregrine Falcon Falco peregrinus 51
33 Osprey: *2004
34 Bald Eagle: *2004
35 Peregrine Falcon: *2004
36 Turkey Vultures
37 SMRR Season Averages ( ) Turkey Vulture Cathartes aura 32,160 Osprey Pandion haliaetus 140 Bald Eagle Haliaeetus leucocephalus 170 Northern Harrier Circus cyaneus 802 Sharp-shinned Hawk Accipiter striatus 9,449 Cooper s Hawk Accipiter cooperii 619 Northern Goshawk Accipiter gentilis 34 Red-shouldered Hawk Buteo lineatus 792 Broad-winged Hawk Buteo platypterus 183,895 Swainson s Hawk Buteo swainsoni 8 Red-tailed Hawk Buteo jamaicensis 7,414 Rough-legged Hawk Buteo lagopus 71 Golden Eagle Aquila chrysaetos 111 American Kestrel Falco spaverius 1,739 Merlin Falco columbarius 50 Peregrine Falcon Falco peregrinus 51
38 80,000 70,000 60,000 50,000 40,000 30,000 20,000 10,000 0 Turkey Vulture: *2004
39 Red-shouldered Hawk
40 SMRR Season Averages ( ) Turkey Vulture Cathartes aura 32,160 Osprey Pandion haliaetus 140 Bald Eagle Haliaeetus leucocephalus 170 Northern Harrier Circus cyaneus 802 Sharp-shinned Hawk Accipiter striatus 9,449 Cooper s Hawk Accipiter cooperii 619 Northern Goshawk Accipiter gentilis 34 Red-shouldered Hawk Buteo lineatus 792 Broad-winged Hawk Buteo platypterus 183,895 Swainson s Hawk Buteo swainsoni 8 Red-tailed Hawk Buteo jamaicensis 7,414 Rough-legged Hawk Buteo lagopus 71 Golden Eagle Aquila chrysaetos 111 American Kestrel Falco spaverius 1,739 Merlin Falco columbarius 50 Peregrine Falcon Falco peregrinus 51
41 1,200 1, Red-shouldered Hawk: *2004
42 Red-shouldered Hawk Adult/Immature Ratios *2004 Theo. Immature Adult
43 Red-shouldered Hawk Adult/Immature Ratios *2004 Theo. NO RECRUITMENT?!?! Immature Adult
44 Conclusions: Migration studies must continue Includes long-term funding for counters, banders and on-site/off-site education
45 Thanks to
46 Thanks to
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