Darcula love to feed on bacteria and parasites found in natural objects. They are commonly mistaken for spreading bacteria and parasites. Although they are plentiful, they constantly avoid being dicovered, and travel in clusters to devour things, while one would often keep watch. They are fast, and are hard to catch, and prove a nuisance to urban households.
Darcula live inside dead tree trunks in dark forests.
Darcula have built up resistance towards Spidox venom from competition; Not even a dose strong enough to take out human adults would have any effect on them.