Trees are quiet good at scattering RF mostly do to the water in them, their density of leaves/needles and the random orientation that they grow in. This leads t

Trees are quiet good at scattering RF mostly do to the water in them, their density of leaves/needles and the random orientation that they grow in. This leads to significant attenuation of the signal even if it isn't absorbed by anything. It's also worth noting that dried wood is almost RF transparent.