deer tick

US /ˈdɪr tɪk/
UK /ˈdɪr tɪk/
"deer tick" picture
1.

a small parasitic arachnid (Ixodes scapularis) that transmits Lyme disease and other infections, commonly found on deer and in wooded areas

:
After hiking, always check for deer ticks, especially in grassy or wooded areas.
Lyme disease is primarily transmitted by the bite of an infected deer tick.