Productivity at Active Peregrine Falcon eyries in Montana, 2006

Revised 8/31/2006

Eyrie

Date(s)

No.Young

Number

Checked

Observer(s)

Location

Fledged

Remarks

1

5-Jul

Sumner

Clark Fork River

4

One young already fledged, other ready to fledge.

2

USFWS

Centennial Valley

Unknown

Roscoe could not check because of too much snow

3

9-Aug

Donofrio

Bitterroot

2

Fledged young seen on two separate observations

4

16-Aug

Donofrio

Bitterroot

3

Confirmed minimum count of three fledged young

5

June

Eggeman & Zucchi

Bitterroot

2

Good count

6

1 &19 July

Rogers

Boulder River

3

Chicks fledged at final count

7

3-Aug

Sumner & Sumner

Troy

Unknown

No fledged young observed

8

13-Jul

Rogers

Livingston

3

Birds Moved to Tastee Freeze?

9

2-Jul

Sumner, Davis , Fuller

Blackfoot River

2

Minimum Count

11

11-Jul

Sumner & Crow

Missouri River

2

Minimum Count-young fledged

13

29,30Jn,18Jly

Rogers

Bighorn

2

15

6-Jul

Sumner

Clark Fork River

3

Minimum Count

16

Rogers

Bighorn

Unknown

Unable to check eyrie

17

25-Jul

Sumner

Clark Fork River

1

Possibly two young-fledged

18

28-Jun

Sumner & Crow

Clark Fork River

4

Young fully feathered out

19

1-Jul

Sumner

Clark Fork River

2

Young fledged, minimum count

20

17-Jul

Rogers

Red Lodge

3

Fledged chicks sitting on cliff face

21

July

Rogers

Madison River

3

Chicks feeding on immature gull at top of cliff

22

27-Jun

Davis

Blackfoot River

1

`Young are ready to fledge

23

4-Jul

Sumner

Clarks Fork/Flathead River

3

Young have already fledged

24

1-Jul

Donofrio

Bitterroot

2

Young in large downy stage

25

McEneaney

Yellowstone Park

2

Yellowstone Park Survey

26

17-Jul

Rogers

Bighorn

3

Chicks sitting together on top of cliff

27

Unknown

Roscoe

Centennial Valley

0

Adults present but no young observed

28

23-Jun

Crow

Flathead Reservation

3

Young in downy stage

29

28-Jun

Donofrio

Bitterroot

2

Young mostly feathered

30

1-Jul

Sumner

Clark Fork River

2

Young behind shrub, need recount

31

3-Aug

Donofrio

Bitterroot

3

Young had already fledged

32

29-Jun

Sumner & Crow

Clark Fork River

3

Young in various stages of development

33

27-Jul

Sumner,Eggeman,Zucchi

Bitterroot

2

Minimum count, possibly 3 young

34

29-Jun

Sumner & Crow

Clark Fork River

3

Moved nesting cliff to the East

35

1-Jul

Sumner

Clark Fork River

1

2nd check, still only one young

36

12-Jul

Rogers/Anderson

Hebgen Lake

4

Final count

37

18-Jul

Rogers

Yellowstone River

2

Difficult to get good count through trees

38

Unknown

Roscoe

Centennial Valley

1

Final count

39

Unknown

Roscoe

Centennial Valley

3

Final count

40

2,4 July

Rogers/Hall

Billings

3

Young fledged by 2 July

41

Multiple

Donofrio

Bitterroot

Unknown

Golden eagles may have caused adults to move

42

12-Jul

Rogers

Gallatin Canyon

2

Minimum Count

43

27-Jun

Dood

Smith River

2

Minimum Count

44

Multiple

Anderson/Rogers

Gallatin Canyon

0

Failed, adults present early in nesting season

45

2-Jul

Rogers

Stillwater River

4

Final check, chicks ready to fledge

46

22-Jul

Rogers

East Rosebud

1

This eyrie can't be checked accurately

47

27-Jun

Donofrio

Bitterroot

3

Young in large downy stage

48

12-Jul

Sumner & Crow

Missouri River

3

Young already fledged-minimum count

49

Multiple

Sumner & Crow

Flathead Reservation

0

We deteced no young during multiple visits

50

12-Jul

Rogers

Madison River

2

Chicks have ledged

51

26-Jun

Sumner & Crow

Flathead River

3

Young in large downy stage

52

3-Jul

Sumner

Big Fork

4

Young about 42 days old

70

1-Jul

Rogers

Boulder River

4

Chicks on ledge

71

6-Jul

Pils

Hebgen Lake

3

Possibly four young

72

4-Jul

Sumner

Flathead River

2

Young have already fledged

73

Multiple

Anderson/Rogers

Gallatin Canyon

2

200 yds N of 2005 eyrie

74

Multiple

McEneaney

Yellowstone Park/Montana

3

No observations during spring by Sumner

77

8-Jul

Sumner

Clark Fork River

2

Young have already fledged

79

8-Jul

Sumner

Jefferson River

2

Young have already fledged

63

6-Jul

Sumner

Clark Fork River

3

Young have already fledged

58

Multiple

Donofrio

Bitterroot

0

Adults observed only during spring

80

Multiple

Rogers

Yellowstone River

0

1 Adult present during late check

81

13-Jul

Sumner & Crow

East Front

3

Young still in large downy stage

82

6-Jul

Sumner

Lower Clark Fork River

0

Eyrie appears to have failed

83

3-Jul

Sumner

Flathead River

0

Eyrie has failed

84

7-Jul

Sumner

Clark Fork River

2

New eyrie, minimum count

85

10-Jul

Sumner & Crow

Missouri River

3

New eyrie, minimum count

86

18-Jul

Sumner & Crow

Flathead River

2

Historic eyrie, young fledged

87

20-Jul

Sumner

Yellowstone River

4

Young have already fledged

88

3-Aug

Sumner & Sumner

Kootenai River

3

Young have already fledged-- sitting in snag

89

Late July

Donofrio

Bitterroot

2

Young had fledged--nesting cliff not known

90

July

McEneaney

Yellowstone Park/Montana

1

Yellowstone Park Survey

Total Active*

65

Running Total Young*

147

Young/active eyrie

2.3

`

Crooked Creek, Coal Creek.and Big Creek removed from table (Inactive eyries)