I've just googled a few links. This one seems to have the most objective info about starlings.
http://www.wild-bird-watching.com/Starlings.html Yes, they eat bugs. I've seen them walking in groups along roadsides hunting bugs in the grass. Marina is correct; they are aggressive, cavity nesting birds, capable of taking over nests from other cavity nesters; i.e. blue birds, martins & woodpeckers. However, starlings make their own nests as well; sometimes (unfortunately) in
dryer,
oven and bathroom vents.
Some of the homes in my neighborhood were constructed with the dryer vent 8 feet up on the side of the house. I've seen starlings trying to nest there. The dryer vent in our house is maybe 18" from the ground, no starling problem there, but we once had a rat trying to nest in it. Dh made a wire screen to keep critters out.
Starlings are serious bathers. When there is a small group of them in my
yard, they will take over the birdbath in an instant. By the time they are done, there is very little
water left and it is full of
poop! Kinda annoying, but they are fun to watch. Robins really enjoy their bath time too, and I'd much rather have them at my bird bath!