Is this Hackberry?

[TXBulldawg]

The tree in your pics is definitely a hackberry and the best thing you can do is chop that sucker down before it falls on your house or the limb falls with your kid in the swing. Those things are notorious for falling branches and splitting down the middle and carpenter ants love em as you already know. The only thing that might be worse for breakage is a Bradford Pear but at least they are pretty for a while.

+1 That thing in KFU's pics is definitely a Hackberry, or what I refer to as "The Leper Tree". Damn things drop branches like nobody's business. Came home from work several weeks back to find my neighbor's huge Hackberry laying across the yard and fence. Missed my house by about three feet. Spent lots of time cutting that thing up, so I'm intimately familiar with them and their stinky-ass wood now.

They're known as fast growers with shallow root systems. What might look like a 200 year old tree might only be 50 years old and nearing the end of it's life. The one in my neighbor's back yard left very few roots or stump behind, and what was there was bone dry. It just fell the F over. No storm, no big wind. Our whole neighborhood has them along the backside.