Rolf Nussbaumer / RF- Large Bee fly (Bombylius sp.) adult feeding on Saladillo (Varilla texana) in flight. Laredo, Webb County, Texas, USA. April. (This image may be licensed either as rights managed or royalty free.)

Rolf Nussbaumer / RF- Black-chinned Hummingbird (Archilochus alexandri) female in flight feeding on Texas Prickly Pear Cactus (Opuntia lindheimeri). Hill Country, Texas, USA. (This image may be licensed either as right...

Rolf Nussbaumer / RF- Erect Dayflower (Commelina erecta). Palmetto State Park, Texas, USA. (This image may be licensed either as rights managed or royalty free.)