I Love Birds! And I really like that term, "twitchers."
We have a tremendous variety of birds here in San Diego County. We live in a relatively rural area with lots of birds and I have seven active feeders right now; the birds eat about
five pounds of seed each day from our back yard in the spring and summer months. The ants have gotten into my hummer feeder again, crawled up my Australian Tree Fern, right beneath the feeder, and trailed right into the homemade sugar water. But the hummers are gorging themselves off our valencia orange tree blossoms right now so they're not lacking for food.
If you want to increase the bird activity near your feeders, offer them water, either a bird bath or something bigger. It can make a dramatic difference. My husband built a small pond near our house and the feeders, with an upper pool and a stream that flows down into the main pool which recirculates, and that made our backyard much more bird friendly, despite our six cats (actually twelve right now because our polydactyl calico just had six kittens last week
). Watching the birds bathe and play in the little pools and stream is really delightful!
Also, our little pond is full of tadpols right now, that hatched from long strings of toad eggs. The number of them is rapidly dwindling so I don't know if they're getting their legs and hopping away or the birds are snacking while they're bathing
.