Grand Canyon Rattlesnake, also called the Pink Rattlesnake, inhabits the Arizona and Utah states of the USA. Its colors, ranging from pink to grey, resemble the surrounding rocks, allowing it to blend into the Grand Canyon's stunning landscape. 

Unlike most nocturnal rattlesnakes, the Grand Canyon Rattlesnake prefers the cooler daylight hours to hunt for small mammals such as mice and rats. However, it may occasionally prey on birds.

This rattlesnake is a small, primarily nocturnal creature found in the southwestern United States and northern Mexico. It can only grow up to 32 inches. Depending on their rocky environment, their color can range from light grey to pink, with mottled patterns of different hues.

It uses the ambush technique to hunt small mammals, lizards, and birds. Unlike other types of rattlesnakes, they are active in colder temperatures.

Banded Rock Rattlesnake (Crotalus lepidus klauberi) found in the Sierra Madre Occidental of eastern Sonora, Mexico.

The Northwestern Neotropical Rattlesnake lives in Southwestern Mexico, with some staying at  Sierra de Coalcomán, reaching elevations up to 6,500 feet. It has a unique skin coloration and can grow around 3.2 feet in length. 

This type of rattlesnake is terrestrial and diurnal, feeding on rodents, birds, and lizards.

Crotalus culminatus syn. Crotalus durissus culminatus at the San Diego Zoo, California, USA

The Baja California Rattlesnake, also called Lower California rattlesnake, is a snake living in Mexico's Baja California Peninsula and the southern tip of California. 

It is relatively small, reaching up to 35 inches, and has a distinctive skin coloration that blends with its desert environments. 

Moreover, it preys mainly on rodents and lizards. Unlike most rattlesnakes, they also eat centipedes of the genus3 Scolopendra.

A curious axolotl fact is that they do not have eyelids, so they sleep with their eyes open, making it difficult to tell when your pet axolotl is awake or asleep. Knowing if axolotl is awake or asleep at night is more difficult.

However, as a nocturnal creature, it is active at night and sleeps during the day. Some signs that show when an axolotl is asleep include stillness of gills and other body activities. It will also most likely retreat to its hiding space when it wants to sleep.

The Eastern Gray Squirrels live in woodlands and urban areas throughout the eastern and midwestern US and eastern provinces of Canada2. 

These agile creatures are most active during sunrise and sunset. Eastern Gray Squirrels also store food in secret stashes, which benefits them and the environment by spreading seeds far and wide.

One of their most impressive tricks is their unique agility. For instance, their ankles can rotate 180 degrees, allowing them to make a death-defying head-first descent down trees.

The Southern Flying Squirrel is a small squirrel species with unique nocturnal adaptations. 

They possess large eyes perfectly adapted for nocturnal adventures and a flap of skin3, called 'patagium,' that stretches from wrist to ankle, allowing them to glide from tree to tree. 

These squirrels live in deciduous and mixed forests and prefer to build their nests in tree cavities. Additionally, the Southern Flying Squirrels huddle together for warmth during the winter season. 

Their diet comprises nuts, seeds, fruits, insects, bird eggs, and small birds. 

Moreover, they play a significant role in their ecosystems by planting the seeds of new forests and being a food source for larger predators.

Northern Flying Squirrels are expert gliders that use a skin-like membrane called the patagium to navigate their treetop homes. 

They typically live in mature, dense forests where they have access to a variety of food, including fungi, which they help to disperse by scattering spores. 

These squirrels also huddle in their nests to keep warm during cold temperatures.

The Arizona Gray Squirrel lives in the coniferous forests of Arizona and New Mexico. These squirrels are known for their gray coat, white belly, and bushy tail. 

They live in the calm wilderness and are often seen in trees, consuming various foods such as acorns, pine seeds, fruits, and berries. 

Likewise, they store food during winter months to ensure their survival and contribute to seed dispersal, which is essential for the health of their forest homes. 

Breeding season occurs in late winter or early spring, and after a gestation period of around 44 days, the female gives birth to 2-3 offspring. With an average lifespan of 6-7 years, these squirrels are survivors.

As the largest tree squirrels in North America, fox squirrels can grow remarkably 27 inches long. Their habitats span the eastern and central United States, extending to the West Coast and Canada. 

Likewise, Fox Squirrels have comfortably settled in various settings, from mature hardwood and pine forests to tree-covered urban neighborhoods.

Fox Squirrels are diurnal creatures with sharp claws and muscular hind legs, making them excellent climbers. They can quickly move up and down trees and leap from branch to branch. 

Fox squirrels prefer acorns, hickory nuts, walnuts, and other tree seeds for food. However, they will supplement their diet with fruits, berries, insects, bird eggs, and small rodents when necessary. 

Unlike other squirrel species, Fox Squirrels do not store food for the winter. Instead, they bury food during warmer months and rely on their remarkable memory to find it when the weather turns cold.