Play the video above to see these stories on AZ Illustrated Nature for Wednesday, March 13:

NATIVE VEGETATION seems to be standing up to the weather extremes of this winter more so than other plants, say officials at Tucson's Tohono Chul Park. Tom Kleespie reports.

INVASIVE VEGETATION also flourishes at times in the desert, to the detriment of other species. The Colorado River Basin, for example, is seeing increasing encroachment of the Old World tamarisk, which comes in a number of species that are starting to dominate some ecosystems. Georgia Davis interviews Susanna Pearlstein of the University of Arizona Department of Soil, Water and Environmental Science.

LOOK SKYWARD for a an uncommon spectacle, the the PanStarrs Comet, first to be visible in Southern Arizona skies in 16 years. Georgia Davis interviews Adam D. Block, manager of the UA-operated Mount Lemmon Sky Center.

THE SALTON SEA west of Arizona across the California line serves as a major stopping point for migratory birds in the desert Southwest. Tom Kleespie reports.