Danaus eresimus, the soldier or tropical queen, is a North American, Caribbean, and South American butterfly in the family Nymphalidae.
Their flight is slow and they are reasonably easy to approach, but will fly for some distance if approached too closely.
The upperside of the wings is dark reddish brown with the forewing sometimes having white submarginal spots. The veins are lightly marked with black. Males have a black scent patch on each of the hindwings. The underside of the wings is also dark brown with a postmedian band made up of squarish spots. The soldier has a wingspan of 2+1⁄2 to 3+1⁄2 inches (64–76 mm).species which has more white markings on the hindwing underside.
Similar species
Similar species in the soldier's range include the monarch (Danaus plexippus) and the queen (Danaus gilippus).
The monarch is more orange, has heavier black-lined veins, and the underside of the wings is a pale yellowish color.
