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!

Here is one more verb to use when you want to avoid giving an answer: "to stall." Sigrid then sums up and gives you some tips for remembering all of the related verbs from both segments of this video.

Here are some verbs that are handy when plans change. This segment features "to postpone," "to delay," "to procrastinate," and "to put off."

Yosemite’s mountain peaks are already capped with snow and a mist rolls through the valleys. The coyote’s mating season begins as winter starts, and the bobcat mother will soon leave her young to fend for themselves.

Yosemite’s trees and animals have adapted to endure the occasional wildfire and the extreme changing of the seasons. In September, marmots prepare their burrows for hibernation and the deer are full of energy as the annual rut approaches.

Now Sigrid has also lost her glasses! In this final part, learn how to use modal verbs to express probability, and find out whether she finds the missing items.