they live in and under a austrailn green tree leaf
No, an alder tree is not a conifer. While conifers are gymnosperms and are part of the Division Coniferophyta, alder trees are, in fact, angiosperms, otherwise known as Division Anthophyta.
A black alder is a variety of tree, Alnus glutinosa, of many practical uses, or the wood which grows on this tree.
No, the alder is not coniferous. It belong to the birch family Betulaceae.
A sycamore tree leaf is large and broad with 3-5 lobes and a serrated edge. It is typically green in color and has a distinct shape that resembles a hand with fingers.
Alder
The Douglas fir (Pseudotsuga menziesii) is a conifer tree that produces large, distinctive cones similar to alder cones. It is a coniferous tree but is not deciduous, unlike alder trees. The cones of the Douglas fir are much larger than those of alder trees.
They are Alder Flea Beetles.
Leaf
A leaf reminds me of a tree, because the veins look like branches. Also, the stem looks like the trunk.
An alder is any of a variety of species of tree or shrub of the genus Alnus, belonging to the birch family.
This is the Alder Flea Beetle. You can see this on the wensite below -