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Bird flying over head with words El Rio Preserve

Birding at El Rio Preserve (April)

7:30 – 9:30 a.m., April 7, 2026

Image of water with brown hills behind the water and the words Nature Trek at El Rio Preserve

El Rio Preserve Nature Stroll (Early April)

8 – 9:30 a.m., April 9, 2026

A collection of images from the Sonoran Desert including cactus, birds, dragonfly and moon,

Signs of the Season Phenology Walk Early April

8 – 9 a.m., April 12, 2026

Santa Cruz River Restoration (Tubac)

9 – 11 a.m., April 15, 2026

Image of bat flying in a dark sky with the words Creatures of the Night

Creatures of the Night at El Rio Preserve (April)

7 – 9 p.m., April 16, 2026

Image of water with brown hills behind the water and the words Nature Trek at El Rio Preserve

El Rio Preserve Nature Stroll (Late April)

8 – 9:30 a.m., April 23, 2026

Cartoon people collecting trash and planting with dates of spring days of connection listed

Santa Cruz Watershed Days of Connection: Earth Day of Connection

8 – 10 a.m., April 25, 2026

A collection of images from the Sonoran Desert including cactus, birds, dragonfly and moon,

Signs of the Season Phenology Walk Late April

8 – 9 a.m., April 26, 2026

Image of the flowing Santa Cruz River

Living River Ramble April

9:30 – 10:30 a.m., April 26, 2026

Santa Cruz River Restoration (Tubac)

9 – 11 a.m., May 20, 2026

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We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples. Today, Arizona is home to 22 federally recognized tribes, with Tucson being home to the O’odham and the Yaqui. The university strives to build sustainable relationships with sovereign Native Nations and Indigenous communities through education offerings, partnerships, and community service.

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