Go to an architectural college and learn construction. There are many disciplines within construction. Choose one that interests you.
Such shelters as you suggest are called houses.
a wigwam
Toucans do not build their own shelter. They nest in abandoned tree holes that other birds and animals leave behind.
a wigwam
Being able to make a shelter... provides a safe place away from the weather, or possible predatory animals. The ability to make clothes - ensures you are able to keep warm in ccolder weather.
A shelter houses a variety of needy animals who are looking for some help from concerned humans . People how are kind and understand that animal have feelings too just like humans will help them and we all should do it .
Animals do not build igloos, and to my knowledge, do not seek shelter in existing igloos. Plenty of animals do burrow in the snow however, or build dens such as polar bears.
build homes for them,give them shelter and food, and take better care of them
So they can: -Build a shelter OR -Use the leaves to protect/carry their food.
It took 4 days to build it
they build shelters to protect themselves from outside conditions. Like the weather.
The Ground Conditions in the Grand Canyon that may affect the shelter you will build is storms and animals .
Brian built his shelter under a rock overhang to protect himself from the elements in the book "Hatchet" by Gary Paulsen.