@JulesJames Tree cavities are rare in young trees. Oaks have amazing abilities to create tree cavities and then live hundreds more years. Birds that are cavity nesters are adapted to use such trees. Birds of all sorts will nest over a busy road if they require a specific type of tree structure to nest and such type is hard to come by but happens to exist next to a busy road. Oaks with cavities are hard to come by, which is why it is not surprising to find cavity nesting species in the 400-year-old Davis Meeker oak. The benefits outweigh the downsides, in the view of the birds who choose this tree.
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