| Which Red Butterfly Do You Have? |
The Monarch is easy; it's orange:
The Viceroy has triangular white dots under it's wings. Underneath it's back wings there is a black line shaped like a C that opens toward the body of the viceroy butterfly. From the top, the Viceroy has dark scales along the wing veins giving it a stained glass window appearance. On top, it's white dots are surrounded by black scales.
Viceroy Butterflies lay eggs on Willow.
Monarch and Queen Butterflies lay eggs on Milkweed. The Soldier uses Milkweed too, but it does not seem to like the red-orange Asclepias curassavica milkweed that most of the stores around me carry.
I haven't found any place that sells our native Florida Milkweeds that the Soldier will lay eggs on, but I have seen a Soldier Butterfly near White Vine Milkweed (not a native, but easily found along canals). I'm still looking for the caterpillar.
The Monarch caterpillar has two sets of threadlike tubercles {Thanks Meg P. for letting me know that those appendages are called tubercles!}, while the Queen caterpillar has three sets.