1. Masked or pale-faced chimpanzees of western Africa; distantly related to the eastern and central chimpanzees; possibly a distinct species
   - western chimpanzee

Type of: chimp, chimpanzee, Pan troglodytes

• yellow star-thistle
• yellow sweet clover
• yellow trefoil
• yellow trumpet
• yellow turnip
• yellow twining snapdragon
• yellow vetchling
• yellow warbler
• yellow water flag
• yellow water lily
• yellow watercress
• yellow woman
• yellow-banded
• yellow-beige
• yellow-bellied
• yellow-bellied sapsucker
• yellow-bellied terrapin
• yellow-blindness
• yellow-blue color blindness
• yellow-blue colour blindness
• yellow-blue dichromacy
• yellow-breasted bunting
• yellow-breasted chat
• yellow-brown
• yellow-crowned night heron