In November 1989, Nancy Fraser, Eaton Canyon Nature Center staff, observed at her feeder in Altadena, Los Angeles County, California, a male Anna’s Hummingbird (Calypte anna) in an apparently weakened condition and with a dark “lump” on its bill. The bird was observed for more than a week, perching at the feeder for periods of up to several hours. On 19 November the hummingbird was increasingly lethargic and harassed by other hummingbirds when it attempted to feed. I suggested that Fraser attempt to capture the bird to provide aid and examine the bill. She was able to remove the bird from its perch by hand, but it expired within minutes. Examination of the lump on the bill revealed the intact head of yellowjacket wasp (Vespula pensylvanica), pierced from front to back directly between the compound eyes. The wasp head lay toward the distal end of the bill, approximately 4 mm from the tip (Figure 1).