Even if you've heard of monk parakeets—the accidentally introduced, bright green parrots known to nest in several American cities—it's still eye-opening when a flock of them flies clumsily over the jogging trail at White Rock Lake, loudly squawking all the way. The curious can find their giant communal nests hidden on the towers of a power station just across the road from the White Rock Pump Station. Watching them through a pair of binoculars as they comically cavort among the transformers and wires is one of the more surreal sights in Dallas, to say the least—it's a must-see for local nature lovers.