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Is allergy season early this year?

Tucson saguaros are blooming. Here's everything you need to know.

Signs of spring begin around nation with sprouting leaves and increased pollen levels

The leaf-out process has started in parts of Florida, Texas, California, and North Carolina. The USA National Phenology Network reports cities such as Miami and Houston are running about five days behind schedule, but some locations in the Carolinas, Southwest and Golden State are more than a week ahead of schedule.

Field Reports: Washington proposes closure for part of Methow Valley Wildlife area to help mule deer

Mayflies, a keystone species, are on the decline on the Mississippi River

A recent study that found a significant decline in mayfly abundance over the past several years has raised concern about the Mississippi River and its food chain, to which mayflies are essential. Scientists are interested in predicting the timing of mayflies. But they need the public's help in doing so.

Celebrate Oro Valley goes virtual April 19 to 23

Celebrate Oro Valley goes virtual April 19 to 23 Celebrate Oro Valley (Source: Town of Oro Valley) By KOLD News 13 Staff | April 6, 2021 at 1:48 PM MST - Updated April 6 at 1:48 PM TUCSON, Ariz. (KOLD News 13) - This year, Celebrate Oro Valley will be a virtual event built around the event’s five foundational pillars: Arts & Culture, Science & Technology, Sports & Recreation, Landscape & Wildlife, and Leadership & Direction. Over the course of five days, staff will post videos and interesting information on each of the pillars, including a fun craft for kids. Videos will be posted around 10 a.m., April 19-23. To participate in this virtual experience, visit the Oro Valley Parks and Recreation Facebook page.

Fall flowers had saguaro experts craning their necks, scratching their heads

Everything else about 2020 has been weird, so why not saguaros? An unusual number of the iconic cacti produced flowers and fruit in the fall this year, and scientists are trying to figure out why. It wasn’t every saguaro. It wasn’t even most of them. But it was more than some experts had seen before. “I’ve lived in Tucson for 30 years, and this seemed unusual to me,” said Don Swann, a longtime biologist at Saguaro National Park. “It seemed unusual to just about everyone I’ve talked to.” The giant cacti typically bloom in late spring and bear fruit in the summer, providing nectar and food for an array of birds and migratory bats that serve as the plant’s primary pollinators.