Q: We moved to a property where there are many shallow, large roots spreading out from a mature tree in the lawn, and the roots have holes in a few places. Should we fill them in to prevent rot? A: ...

Question for Dan Gill: Could you explain why too much fill can kill a tree? --Carol Cohen Answer: Tree roots breathe in oxygen and breathe out carbon dioxide. They obtain the oxygen they need from the ...

Watch along as Dr. Clay Corbin of Bloomsburg University bands some tree swallow chicks, it's all part of the Tree Swallow Project.

There are eight species of swallows in North America with seven species in Montana. The cave swallow is mostly found in Texas and Mexico. Tree, violet-green, northern rough-winged, bank, barn, and ...

Tree swallow nests across Pennsylvania are being collected for an investigation into the patterns that the common, fast-flying, cavity-nesting birds might incorporate into their nest construction.