Please forgive any mis-spellings my spellcheck is not working...
Yes, fewer hummers.
What the other responders are seeing are locally large populations.
Otherwise there has been a general decline of ALL species of birds, esp. songbirds.
This is due to several factors, all come back to human activity:
-- Exploding human population, less wild habitat. This has to do with more intense pressure of the 'burbs, farming, and industry. There are more demands on the land than the land can handle and recover sufficiently as new wildlands.
-- Exploding population of outdoor cats. Cats are not a natural member of the environment. Yes, they are natural born hunters -- with VERY deadly results.
-- Pesticides
-- General apathy or ignorance.
The "science" comes down to human economics, greed, and human over-population. To prosper, there must be expansion. To expand, there is a manic immediateness to destroy rather than work with Nature.
You will see arguments that there are "plenty of places man can expand, prosper, and populate." That "technology will save us." That "the new generation will work it all out." <--- A real "NOT!" on that one. They grow up just as greedy as their predicesors.
Another part of the problem is the lack of interest in real quantitative / qualitative science. Our modern society lives in a surprising and disturbing orb of superstition.
In addition, how many Business majors are there in proportion to Scientists? How many MBAs do you know with an actual "well rounded" education?
My point is:
Money speaks MUCH louder than simple common sense.
http://news.nationalgeographic.com/news/2002/11/1105_021105_BirdDecline.html
http://www.worldwatch.org/node/1763
http://www.audubon.org/bird/stateofthebirds/CBID/
.