Hummingbirds

I know that I write this same post twice a year but it thrills me every time--spring and fall humminbird migrations. The hummingbirds are gathering along the Texas Gulf Coast for their fall migration to Central America. We had very few hummers over the summer but during the last week we have at least 5 feasting on our salvia plants and our 3 feeders and more will come during the next 3 weeks. One year we had about 30. How do they know? How do they do it? They are so very tiny, so fragile, so fiercely territorial! It is just a miracle!