1. Of northern United States and Canada
   - spruce squirrel, red squirrel, Sciurus hudsonicus, Tamiasciurus hudsonicus

Type of: tree squirrel

• Oceanid
• Oceanites
• Oceanites oceanicus
• oceanographer
• oceanography
• oceanology
• Oceanus
• ocellated
• ocellated turkey
• ocellus
• ocelot
• oche
• ocher
• ochlesis
• ochlocracy
• Ochna
• ochna family
• Ochna serrulata
• Ochnaceae
• Ochoa
• polycarpic
• polycarpous
• Polychaeta
• polychaete
• polychaete worm