USGS - Science for a changing world

Table 1. Movement of RMP trumpeter swans from the breeding season to post-breeding season. Of the swans that were present during the breeding season at areas listed on the vertical axis, the percentage of those birds that spend time at a post-breeding area listed on the horizontal axis is shown. In brackets, is the confidence that experts had in that percentage [1.00 = maximum certainty; 0.50 = maximum uncertainty]. An "X" signifies that birds are thought to migrate in this direction, but quantification by the experts was not possible. Because birds can move among areas within a season, row and column totals can exceed 100 percent.
 
Breeding Areas (below) Post-Breeding Areas (right) Canada Okanogan Freezeout Lake Flathead Valley Upper Madison/ Hebgen Lake Ennis Lake/Mid-
Madison		 Lower Madison Centennial Valley Teton Basin Swan Valley  Island Park Lower Henry's Fork /Market L./Sand Cr. Paradise Valley Yellowstone Lake & nearby River Jackson Hole Green River Camas NWR/ Mud Lake American Falls Reservoir Grays Lake NWR Salt River Bear R. Basin/Bear L./ Soda Springs Bear River MBR/ Great Salt Lake Bliss/ Lower Snake River Ruby Lake NWR Malheur NWR Summer Lake Central Valley, CA
Canada
X
20 
[.80]
5 
[.80]
X
10 
[.80]
X
75 
[.90]
X
X
2 
[.50]
2 
[.50]
X
Okanogan
Freezeout Lake
100 
[.95]
Flathead Valley
Upper Madison/ Hebgen L.
Ennis Lake/ Mid Madison
Lower Madison
Centennial Valley
5 
[.50]
100 
[.99]
10 
[.75]
50 
[.90]
50 
[.50]
X
5 
[.75]
5 
[.90]
Teton Basin
Swan Valley
Island Park
5 
[.75]
X
10 
[.90]
10 
[.75]
100 
[.99]
5 
[.50]
X
5 
[.75]
15 
[.75]
Lower Henry's Fork/ Market L./ Sand Cr.
Paradise Valley
X
Yellowstone L./R.
10 
[.75]
5
[.50]
5 
[.65]
25 
[.50]
Jackson Hole
X
95 
[.99]
35 
[.75]
Green River
100 
[.95]
Camas/ Mud Lake
15 
[.75]
American Falls Res.
90
[.90]
100 
[.99]
Grays Lake
5
[.60]
80
[.95]
40
[.85]
50
[.85]
Salt River
Bear River Basin/ Bear Lake/ Soda Springs
100
[.99]
Bear River MBR/ Great Salt Lake
Bliss/Lower Sake River
Ruby Lake
100
[.99]
Malheur
95
[.95]
Summer Lake
100
[.85]
Central Valley, CA


Table 2. Movement of RMP trumpeter swans from the post-breeding season to winter. Of the swans that were present during the post-breeding season at areas listed on the vertical axis, the percentage of those birds that spend time at a wintering area listed on the horizontal axis is shown. In brackets, is the confidence that experts had in that percentage [1.00 = maximum certainty; 0.50 = maximum uncertainty]. An "X" signifies that birds are thought to migrate in this direction, but quantification by the experts was not possible. Because birds can move among areas within a season, row and column totals can exceed 100 percent.
 
Post-Breeding Areas (below) Wintering Areas (right) Canada Okanogan Freezeout Lake Flathead Valley Upper Madison/ Hebgen Lake Ennis Lake/

Mid Madison

 Lower Madison Centennial Valley Teton Basin* Swan Valley  Island Park* Lower Henry's Fork /Market L./Sand Cr. Paradise Valley Yellowstone Lake & nearby River Jackson Hole Green River Camas NWR/ Mud Lake American Falls Reservoir Grays Lake NWR Salt River Bear R. Basin/Bear L./ Soda Springs Bear River MBR/ Great Salt Lake Bliss/ Lower Snake River Ruby Lake NWR Malheur NWR Summer Lake Central Valley, CA
Canada
Okanogan
100
[.99]
X
Freezeout Lake
50
[.90]
50
[.90]
15
[.75]
15
[.75]
75
[.95]
20
[.75]
5
[.60]
2
[.60]
10
[.75]
1
[.60]
2
[.60]
X
Flathead Valley
Upper Madison/ Hebgen L.
100
[.99]
20
[.75]
20
[.75]
95 [.99]
20
[.80]
10
[.70]
2
[.60]
10
[.75]
X
1
[.60]
2
[.60]
X
Ennis Lake/ Mid Madison
90
[.99]
25
[.75]
20 [.75]
95
[.99]
35
[.80]
2
[.60]
10
[.75]
1
[.60]
2
[.60]
X
Lower Madison
80
[.90]
25
[.75]
Centennial Valley
1
[.60]
15
[.75]
5
[.70]
90
[.95]
35
[.80]
5
[.6]
5
[.95]
X
[.75]
Teton Basin
100 [.99]
25 [.80]
60 [.95]
50
[.80]
5
[.70]
5
[.75]
Swan Valley
Island Park
20
[.75]
20
[.75]
100
[1.0]
40
[.95]
10
[.70]
2
[.60]
10
[.75]
X
[.60]
2
[.60]
X
Lower Henry's Fork/ Market L./ Sand Cr.
Paradise Valley
Yellowstone L./R.
30
[.75]
15
[.75]
5
[.60]
50
[.80]
15
[.75]
100
[.99]
5
[.70]
X
[.50]
X
[.60]
X
[.75}
Jackson Hole
10
[.70]
10 [.70]
5 [.70]
100
[.99]
25
[.85]
Green River
100
[.99]
Camas/ Mud Lake
35
[.85]
30
[.85]
60 [.80]
75 [.90]
30
[.85]
American Falls Res.
X 
[.55]
100
[.99]
Grays Lake
10
[.80]
5
[.80]
45
[.95]
20
[.75]
Salt River
Bear River Basin/ Bear Lake/ Soda Springs
100
[.99]
25
[.55]
Bear River MBR/ Great Salt Lake
Bliss/ Lower Sake River
Ruby Lake
100
[.99]
Malheur
100 

[.99]
Summer Lake
100 

[.99]
X
Central Valley, CA

*Teton Basin and Island Park probably function as one wintering area because there is much interchange of birds.
 


Table 3. Movement of RMP trumpeter swans from winter to the pre-breeding season. Of the swans that were present during the winter season at areas listed on the vertical axis, the percentage of those birds that spend time at a pre-breeding area listed on the horizontal axis is shown. In brackets, is the confidence that experts had in that percentage [1.00 = maximum certainty; 0.50 = maximum uncertainty]. An "X" signifies that birds are thought to migrate in this direction, but quantification by the experts was not possible. Because birds can move among areas within a season, row and column totals can exceed 100 percent.
 
Wintering Areas (below) Pre-breeding Areas (right) Canada Okanogan Freezeout Lake Flathead Valley Upper Madison/ Hebgen Lake Ennis Lake/

Mid Madison

 Lower Madison Centennial Valley Teton Basin Swan Valley  Island Park Lower Henry's Fork /Market L./Sand Cr. Paradise Valley Yellowstone Lake & nearby River Jackson Hole Green River Camas NWR/ Mud Lake American Falls Reservoir Grays Lake NWR Salt River Bear R. Basin/Bear L./ Soda Springs Bear River MBR/ Great Salt Lake Bliss/ Lower Snake River Ruby Lake NWR Malheur NWR Summer Lake Central Valley, CA
Canada
Okanogan
100 [.99]
Freezeout Lake
Flathead Valley
Upper Madison/ Hebgen L.
75 

[.90]
100 

[.99]
75 

[.90]
2 

[.60]
Ennis Lake/ Mid Madison
75 

[.90]
100

[.99]
Lower Madison
Centennial Valley
Teton Basin*
80 

[.90]
80 

[.90]
80 

[.90]
10 

[.90]
80 

[.90]