At dusk, a female firefly signals to a male from her perch in a patch of goldenrod. She can rotate her light organ to face her suitor, who in this case is in front of her. Urbana, Illinois, USA.
A female firefly signals from her perch in a patch of goldenrod. Her light organ is much less conspicuous than that of a male. Urbana, Illinois, USA.
After a call-and-response light signalling interaction, a male firefly (left) lands on the female's perch. Urbana, Illinois, USA.
