Mi casa is .9 miles from the Rio Grande. if I was inclined to hunt I could do it from my back porch in a bathrobe.
Canada geese are headed south. that means the weather will go sour in two weeks. get your outdoor projects finished or under cover
if you get up at the crack of dawn and the sun is barely above the mountains to the east the sunlight hits the bottom of their wings. it looks like a quarter mile long bit of Christmas tree tinsel floating southward.
Do the Geese have to pay tariffs now ?
I don't know about tariffs, but they'll have to be photographed, possibly be fingerprinted (that ought to be interesting...) or have a DNA swab taken when they cross the border. Might also have to put up a visa bond.
When OP sees canadian geese near rio grande heading south, they are leaving the USA...
And these days they would probably have their social media posts checked as well.
canada geese are notorious for air dropping samples of dielectric material. maybe find DNA in that
Years ago all of the ones around here, NE Ohio, stopped migrating now they are just here 365 days a year. My understanding is that the young learn to migrate from the adults and when the adults stopped migrating the migratory pattern ended.
Ron
They are leaving the US. They will be subject to tariffs when they attempt to return in the spring, like the penguins are.
No Canada Geese this year as Trump has imposed a 100% tariff. They will be going to China instead and will appear in dishes like Peking Goose.
But won’t all the wind turbines in China make them autistic and inedible?
We have a group that breed and hang out here all year - there's a lake. However, once all the lakes and ponds freeze over they're gone. Actually the Canada geese aren't all that bad. But Snow geese? Not good neighbors!
Ours just hang out all year. Ponds freeze over as well as Lake Erie and they just stay. 
Years ago they went south but not anymore.
Ron