The saguaro cactus blooms overnight and its flower is visited the next morning by a Gila woodpecker. As the heat of day rises, harvester ants work go about their work, wary of a mortal enemy in the park.

The two sisters unpack a box that hadn't been opened since she moved to the house in Tacoma. It contains artwork she had done in the past along with some stray art supplies.

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May sees drought conditions in the park, but the saguaro cactus is completely unaffected. A family of ground squirrels is laying low, but a long-nosed snake has caught their scent.

Sylvia talks about how her diagnosis was reached and about what limitations there are for her now, such as going out for walks by herself and singing in the choir at church.

The heat of a scorched riverbed is too much for some animals, but the rare and venomous Gila monster is still active and hunting for prey. Meanwhile, the untiring hummingbird mother will feed her remaining chick until it finally fledges.

Sylvia is willing to talk about her Alzheimer's diagnosis, even though she struggles to form sentences and find the right words.

Despite the intense heat, a female hummingbird must adapt her diet and work non-stop to feed the young in her nest. The rattlesnakes are breeding, and the victorious male claims its hard-won mate.

This final segment is about two fun expressions: "to kick the can down the road" and the currently popular expression, "Delay, delay, delay." Then Sigrid sums up parts 3 and 4.

Male rattlesnakes “dance” in a show of strength designed to win females. A cholla cactus uses its prickly form of defense and the passing javelina to populate new parts of the desert. Meanwhile, the javelina’s tiny young are threatened by a hungry coyote.

A courageous roadrunner faces off with a venomous rattlesnake. The small amount of precious rainfall that January provides gives the desert a sudden spark of life. Plants grow, flower, and store water, and the tiny Costa’s hummingbird uses the finest materials that nature provides to make a nest for her young.

Now we'll look at some verbs and phrasal verbs that use imagery to talk about plans and timetables that change. This segment is about "to shelve," "to put on ice," "to put on hold," and "to hold off."

Arizona’s Saguaro National Park was created to save the iconic and increasingly rare saguaro cactus from extinction. Within the park’s desert scenery, conflicts arise between species and can often resemble an Old West showdown at high noon!

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Isaac visits one of America’s most well-loved settings for outdoor adventure, Yosemite National Park, which is famous for its iconic granite peaks, waterfalls, and roaming bears!