The leaves of a eucalyptus change when they reach different stages of maturity. Young trees often have round leaves that change and become longer with a sickle shape or spearhead shape as they get older.
Eucalyptus have special flowers and fruits that no other trees have. When it flowers a bud cap made of petals grows around the flower until it is ready to open. Then the bud cap falls off to reveal a flower with no petals.
Autumn, or Fall. That's pretty much why they call it Fall. the leaves FALL off trees.
In the fall. Trees pull back some moisture from leaves before they dessicate, turn brown, and fall off.
Deciduous.
the tree is referred to as a deciduous tree.
Trees that do not loose their leaves are called Evergreens as opposed to Deciduous or those that do loose their leaves in the autumn/winter. Examples of Evergreens are Conifers- blue spruce, cedar- holly, oak.
They fall off.
They decompose
Autumn, or Fall. That's pretty much why they call it Fall. the leaves FALL off trees.
Evergreen trees lose only a few old leaves at a time.
In the fall. Trees pull back some moisture from leaves before they dessicate, turn brown, and fall off.
Gravity, wind, birds, squirrels
Deciduous.
because its cold and they freese and fall off
Using their sharp front teeth, koalas nip off the eucalyptus leaves, and chew them with the grinding molars at the back of their mouth.
All trees are perennial. Deciduous trees drop their leaves in the Autumn. Evergreens do not drop them at any specific time of year.
Maple leaves turn a beautiful red color and do fall off the tree.
I believe all maples lose their leaves in the fall but certain oak trees keep their leaves all year. The "live oak" is named such because it keeps its leaves through the winter.