Soldier butterfly
Danaus eresimus
The third North American Danaus, scarce, easily overlooked, and largely confined to south Texas and peninsular Florida.
What it does on milkweed
Soldier caterpillars feed on milkweeds and, more often, on the twining milkweed vines. Adults nectar widely and, like the queen, males seek pyrrolizidine alkaloids from withered heliotrope.
How to recognize it
Brown like a queen but with softer, paler wing veining and a distinctive pale patch across the hindwing underside. Best confirmed with a photograph rather than a glance.
Where and when
South Texas and southern Florida, occasionally straying north along the Gulf. Most often seen April to November.
Should you do anything about it?
A record worth reporting. If you think you have one, photograph the underside of the hindwing.
Soldier butterfly: common questions
Is the soldier butterfly rare?
In the United States, yes: it reaches only the far south of Texas and Florida. Across the American tropics it is common.
Cite this page
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Milkweed USA. (2026). Soldier butterfly (Danaus eresimus). Retrieved DATE, from https://milkweedusa.com/wildlife/soldier-butterfly/
"Soldier butterfly (Danaus eresimus)." Milkweed USA, 2026, https://milkweedusa.com/wildlife/soldier-butterfly/. Accessed DATE.
Milkweed USA. "Soldier butterfly (Danaus eresimus)." Last modified 2026-08-01. Accessed DATE. https://milkweedusa.com/wildlife/soldier-butterfly/.
@misc{milkweedusa_wildlifesoldierbutterfly,
title = {Soldier butterfly (Danaus eresimus)},
author = {{Milkweed USA}},
year = {2026},
url = {https://milkweedusa.com/wildlife/soldier-butterfly/},
note = {Accessed DATE}
}