Jewelweed on the Boxers trail in East Fairmount Park, Philadelphia, Pennsylvania this afternoon. Interestingly, right when the hummingbirds need lots of blooming nectar rich flowers as they prepare for their migration and even begin migrating, the Impatiens are in their top blooming order!
Because of their small size, scientists are not able to track migration patterns of individual hummingbirds like they can for Snowy Owls and other large birds. So there is a gap in knowledge about exactly how they go about their migration.
This is the time of year when they begin migrating.