My butterfly garden was full of a brilliant orange this morning as a few gulf fritillary butterflies fluttered in feeding on the nectar flowers.
The nectar from the flowers holds both proteins and other chemicals, which help the butterfly both receive energy, or pheromones for males. When the butterfly is fluttering by a nectar plant it will look at the shape, color, fragrance and test the flower by using its antennae, palpi, tarsi (feet) and its proboscis, which all have sensory receptors.
I read in “Florida Butterfly Gardening” that the nectar may only be secreted during certain hours of the day, which may be why the butterflies are abundant during the morning hours.

What beautiful visitors to welcome to your garden!
They are stunning!