Scotts Bluff National Monument Butterfly Guide 🦋

Wingspan: 3/4 - 1 1/8 inches (2 - 2.9 cm)
Host plants: pea family (Fabaceae), yellow sweet clover (Melilotus officinalis), rattleweed (Astragalus), mesquite (Prosopis), indigo bush (Dalea), mimosa (Albizia), and indigo (Indigofera) species.
Adult food: Flower nectar from a variety of herbs including spearmint and white sweet clover.
Overwintering stage:
Mate-Location system: patrolling
Flight: 3 broods from March-November everywhere in its range (except South TX); migrates north once each year after hibernating in the south.

Source: https://www.butterfliesandmoths.org/species/Echinargus-isola less ↑

Wingspan: 7/8 - 1 3/8 inches (2.2 - 3.5 cm)
Host plants: pea (Fabaceae) and mallow (Malvaceae) families including beans (Phaseolus), clovers (Trifolium), cotton (Gossypium), and mallow (Malva)
Adult food: Nectar from many flower species including dogbane, milkweed, mint, winter cress, goldenrod, tick trefoil, and white sweet clover.
Overwintering stage: chrysalis
Mate-Location system: perching
Flight: 2 flights from May-September in the north, 3-4 flights from February-November in the south.

https://www.butterfliesandmoths.org/species/Strymon-melinus less ↑

Color: Upperside of male blue with narrow dark border; female brown with blue tinge.
Wingspan: 7/8 - 1 3/8 inches (2.2 - 3.5 cm)
Host plants: Alfalfa (Medicago sativa); common sweet clover (Melilotus officinalis); lupines (Lupinus spp.)
Overwintering stage: caterpillars
Mate-Location system: patrolling
Flight: April-October

https://www.butterfliesandmoths.org/species/Plebejus-melissa less ↑