fireram
Well-Known Member
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.
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.
Trumpeter Swan - Trends map - eBird Status and Trends
This map depicts the cumulative change in estimated relative abundance from {0} through {1} with circles representing 27km x 27km regions. Red indicates decline and blue indicates increase. The darker the color, the stronger the trend. White circles represent locations where the trend estimate...
science.ebird.org