microscopic parasites ticks, mites, ixodes scapularis or deer tick or blacklegged tick, dermacentor reticulatus or ornate cow tick

acari activity arachnids background biology blacklegged cause closeup danger deer dermacentor disease encephalitis forest gimlet grass infectious insects ixodes macro medicine microscope microscopic mite mites nature ornate parasites parasitic parasitiformes parasitology proboscis research reticulatus scapularis science season small spring summer tick tickborne ticks viral warning wildlife zoology