The month of March went down as one of the warmest months ever, for North America that is. The rest of the Earth was actually slightly cooler than normal.
A few days ago, central NJ hit 80 and then 90 degrees. Very impressive warmth for mid-April, but not unprecedented. The warmth led to the nuptial flights of at least three Camponotus species. These include C. caryae, C. pennsylvanicus, and C. chromaiodes. I took some pictures and even recorded a video.
The video can be seen here:
Also, here are some of the pictures I mentioned that came out pretty well.
These are what people typically refer to as carpenter ants. They inhabit rotting wood and and can be a significant pest if they decide to nest in a structure or home. Many are typically nocturnal but C. caryae is day-active.