(F) Underparts very yellow with white undertail coverts, while upperparts, including head, olive green. Lower wing bar buffy and quite wide. Tail feathers with white tips and inner webs. Bill pinkish. (M) Body entirely bright lemon yellow with white undertail coverts. Jet black cap. Black wings with yellow lesser coverts and narrow white tips to greater coverts, forming 2 white wing bars along with white edging to the tertials. White inner webs to most of the tail feathers. Pink, conical bill.