Site Help: Insect or Bug ID , 1 by DisneyButterfly

DisneyButterfly wrote:
Need some of your help this ID? Does anyone know what these are? They stayed in this cluster the entire time we watched them. They went up & down the Memosa tree. If the lead critter moved right...the rest followed. Same if the leader went left. They just kept going zig zag up and down the tree, all together in this cluster. Really cool to watch them, but have no idea what they are???

Thanks!!