The ponderosa pine had taken root decades before the Revolutionary War, making a stately stand on this western Sierra Nevada slope for some 300 years, Nate Stephenson figures.

So who needs a dead hollow tree anyway? Maybe you and I don’t, but we’re not the ones who should have a say in the matter. The list of birds and mammals that depend on “den” trees for ...

Trees with a 14- to 20-inch diameter are required for nesting and large numbers of other trees that have been infested with insects are required for food. Male birds will excavate nest holes in dead ...