Wood species?

Looks like walnut, might be stained oak.

The consensus hear will be oak. Impossible to tell without an unstained or finished pic , hardness rating , end grain pic and weight per bd/ft and iffy answer at that..

I'm no for sure it's not oak, cedar or walnut. It's a little on the soft side but not to soft.
Look close to some mahogany that I have but the grain is different.

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May be wrong but I think it’s old growth yellow pine.

An almost impossible ask !

There are many species of oak, walnut and don't even get started with mahogany. Also which continent and latitude the tree grew on can create surprising variations from the same species of tree.

The wood in the picture seems to have had a previous purpose knowing that would help as well as planing it back to its natural self. Seeing the end grain might be more informative.

Density is also a good guide as many of the exotic hardwoods when seasoned actually sink in water.

Having said all that IT'S OAK without a shadow of a doubt !

I remembered who gave it to me, so I ask him and he said it is red wood. It was leftover from a swing project he did.

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It might be stained ash. Then again, it might not.

That's what I said Sequoiadendron giganteum.

Might be some variety of rosewood too. Maybe that's what they meant by red wood.