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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.

United statesDon swannFred heathDoug kreutzErin posthumusNational parks associationFriends of saguaro national parkSaguaro national parkUnited states national phenology networkSaguaro nationalBill peacheyColossal caveBear canyonNational parkWestern national parks associationSabino canyon