Er, beg to differ slightly.
The angle and lighting are poor, so it looks like the light-brownish bird with the short tail in the foreground and the one at the top-left-hand of the picture are starlings, but the rest are all grackles. Dead giveaways are the long tail, the elongated black-purple iridescent head–especially on the one in the lower-right hand corner–and the lack of speckles or dots on the back.
Starlings are short ‘n’ chunky and have white/tan dots on their backs in breeding plumage. They also have dots on their breasts early in the breeding season, but as the feather tips wear off by brushing against the nest, those tend to fade. Starlings also have bright yellow beaks.
Grackles are long and slender, have long tails, and are solid black on their backs and fronts, and have black beaks.
Starling. Note the short tail and the back full of dots, and the yellow beak.
Grackle. Long black body, long tail, no dots, black beak.
Get some better pictures that show the beaks. You’ve got both starlings and grackles there.
Also:
Grackles are cool.
Starlings are not.
Starlings are nuisance birds who will raise two broods a year anywhere you’ll let them, such as your roof gutters, your porch overhead, or in other birdhouses where you’d much rather have purple martins. And as mentioned, they will flock in enormous shit-storming flocks, as their favorite roost happens to be the tree under which you customarily park your car.
Watching starlings flock is only “spectacular” in the sense that watching a horde of locusts would be spectacular.
Saith the jaded homeowner with a chronic starling problem… 