Resources for extending the learning
Featured Species: Those @#$%^##$!!! Geese
Question: When are taxonomists a positive force for biodiversity?
Answer: When they make two new species out of one old one!
Just when you thought that you had enough geese now you have more: science has split the Canada Goose (Branta canadensis) into a large-bodied, interior- and southern-breeding species (still Branta canadensis), and a small-bodied tundra-breeding species, the Cackling Goose (now B. hutchinsii). To make things even more confusing, there are four Cackling subspecies and seven Canada subspecies.
The obvious difference is size, as shown in this photo. And keep in mind that our resident Canadian, the Giant Canada Goose, is even bigger than canadensis above. And the Giant is really a success story. Nearly eliminated in early 1900’s by over-hunting and loss of habitat, the Giant Canada Goose was believed to have gone extinct by the 1950s. But in 1962, a small flock was discovered wintering in Minnesota. With improved conservation practices and habitat recreation and preservation programs, their populations have recovered in most of their range. Too well, according to some, but when you build great habitat (short grass near water), eliminate predators and provide lots of food, you have to expect that they will come. Most of the birds you see now on our lakes and rivers will be these Giants. Most of the Cackling and other Canada Goose subspecies will have moved further south, but a few may still intermingle as they rest along their way. See if you can spot any smaller geese when they raft up.
It might be easier to see Snow Geese
, distinctive, almost all-white waterfowl (although there are also "blue phase" birds with blue-gray colouration) which can occasionally be found among Canadas and other water birds. Vast flocks overfly areas to the east (Greater Snow Goose) and west (Lesser Snow Goose) of south central Ontario while on migration. The occasional bird gets blown off-course and ends up spending a few days with us late in October before moving on.
Other Happenings: