Natural fractals "Contest ENTRY " Shadow

Yesterday was a sunny winter day and this is a rarity in recent years. I managed to photograph these silhouettes of trees as we drove along a large highway.
It is at this time that these natural fractals can be clearly seen.
What do the silhouettes of these trees look like? May be its like: 1) branching networks of blood vessels, 2) the bronchial tree 3)river system... . I think this list can be continued. I would like to know your opinion.