Seasonal bugs appear around October. They seem to related to milkweed bugs based on their physiology and are also common around the same time but they tend not to cluster as the milkweeds do. They are found in large loose groups on the same plant but only really interact when mating. The young are usually found solitary and although visually nymphs are virtually identical to milkweeds the behavior is different, these being a lot more skittish.
Tropical dwarf dry forest
These are true bugs (hemipteran) noted by their rostrum (mouthparts used for feeding) and believed to be of the family Lygaeidae Snaps also added from 19 Oct 2011