How do black skimmers reproduce?

Black Skimmers lay eggs directly on sandy, shelly, or stony ground, usually on islands or remote beaches that have at least a little vegetation. Some nest in the higher parts of saltmarshes.

What is a group of skimmers called?

The Black Skimmer is the only bird species in the United States that has a larger lower mandible than upper mandible. A group of skimmers are collectively known as a "conspiracy", "embezzlement", and "scoop" of skimmers.