"While Defenders has always recognized that professional control of wolves that prey on livestock is a necessary evil, allowing random, non-selective take through public hunting and trapping is a poor wildlife management decision, " warned Nina Fascione, Defenders of Wildlife associate director of species conservation.

CNN: Defenders of Wildlife oppose gray wolf bill

The crazy ants, officially called "Tawny crazy ants, " are omnivores that can take over an area by both killing what's there and starving out what they don't kill, said Ed LeBrun, a research associate with the Texas invasive species research program at the Brackenridge Field Laboratory in the College of Natural Sciences.

CNN: 'Crazy ants' a threat in southern U.S.

"Monarchs are considered to be a flagship species for conservation, " said Cornell entomologist Linda Rayor, an associate on the study.

CNN: Researchers find bio-engineered corn harms butterflies