Why are they threatened?
Their existence is threatened by habitat destruction and fragmentation.
Where there was once a forest, there are now condos, shopping malls and parking lots. The problem is that their habitat and the string of sanctuaries along their migratory route are rapidly disappearing.
The energetic 3″ Ruby-throated Hummingbird, for example, migrates from as far as New England to the South American rainforest. So when this tiny fragile hummingbird is reaching day’s end and seeks shelter in a tree, but sees none, she may never reach her destination. The string of stops along their migratory route enable their migration and allow these amazing birds to exist.
Healthy habitat in the Caribbean, Mexico, and southward and a string of sanctuaries and lots of safe space in Canada and the United States are necessary for Neotropical migrant birds to carry on.