This sizable group of Hackberry Emperor butterflies is feeding on a sap flow. Joining them is a pair of slightly differently patterned Tawny Emperor butterflies as indicated by the red arrows in the first photograph. Can you see the difference?

CountyDenton
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CityLewisville
DateSep 29, 2009
Time of DayNoon
TemperatureWarm (70-89°F/21-32°C)
WeatherClear
HabitatRecreation-Park
Type of BehaviorFeeding
GenderUncertain
MaturityAdult
ObserverChris Jackson