Sandhill Cranes & Tundra Swans

Some more ammo for you case:
The cornell lab of ornithology, has produced a web site with an interactive map that displays current trends in bird populations, including waterfowl.
Its a bit awkward to navigate at first, but eventually ya can get the hang of it.
The trend for trumpeter swan is one of the few, that shows an increasing pop trend.
Sadly, almost all others that I checked, cans, bluebills, redheads, etc are in a declining population trend, and i believe its data is from 2007 until now, or 2014 for some species.
Lots of other good info on there, migration patterns, timing etc.

 
Hello Fireram,

Thank you for your support and for the additional information that you have provided regarding the Trumpeter Swan population.

The US Fish & Wildlife Service has recently estimated that the Trumpeter Swan population is increasing by 10,000 birds per year.

Jerome
 
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