The annual fall trumpeter swan survey is conducted to determine production and distribution for a portion of the Interior Population of trumpeter swans called the High Plains Flock, in accordance with the Interior Population and High Plains Flock trumpeter swan management plans (1997 and 2005, respectively). Each plan outlines population objectives (VI-2 and A-1) and management strategies for monitoring population status, which includes aerial surveys in South Dakota and Nebraska. These surveys are part of a trumpeter swan monitoring program that spans over two decades to track abundance trends in the flock and condition of the wetlands swans inhabit
Observers counted 3,974 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...
Observers counted 371 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Observers counted 4,701 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
Re-introduction of trumpeter swans (Cygnus buccinator) at Lacreek National Wildlife Refuge (NWR) beg...
Re-introduction of trumpeter swans at Lacreek National Wildlife Refuge (NWR) began in the early 1960...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
Observers counted 473 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Re-introduction of trumpeter swans at Lacreek National Wildlife Refuge (NWR) began in the early 1960...
Observers counted 5,265 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...
The abundance and productivity of North American trumpeter swans (Cygnus buccinator) was assessed du...
Observers counted 527 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Observers counted 507 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Observers counted 3,974 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...
Observers counted 371 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Observers counted 4,701 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
Re-introduction of trumpeter swans (Cygnus buccinator) at Lacreek National Wildlife Refuge (NWR) beg...
Re-introduction of trumpeter swans at Lacreek National Wildlife Refuge (NWR) began in the early 1960...
The annual fall trumpeter swan survey is conducted to determine production and distribution for a po...
Observers counted 473 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Re-introduction of trumpeter swans at Lacreek National Wildlife Refuge (NWR) began in the early 1960...
Observers counted 5,265 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...
The abundance and productivity of North American trumpeter swans (Cygnus buccinator) was assessed du...
Observers counted 527 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Observers counted 507 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Observers counted 3,974 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...
Observers counted 371 swans (white birds and cygnets) in the U.S. Breeding Segment of the Rocky Moun...
Observers counted 4,701 swans (white birds and cygnets) in the Rocky Mountain Population of trumpete...