Relier Pairs CEDES19/20 - NAT6 - Unit5 Act2Version en ligne Match the two columns. par Javier David Panadero 1 Canopy layer 2 Emergent layer 3 Understory layer 4 Forest floor Trees are usually about 50 or 60 metres tall. Birds, mammals, insects and reptiles all live up here. Many never leave the treetops and spend their whole lifecycle here. Part of the forest that belongs to invertebrates, fungi and bacteria. Part of the forest made up of trunks, branches, bushes and shrubs.