[Jedd]

There are many mulberry varieties spanning red, black, and white.

The white - look for Shahtoot - has long and slim fruit, with a much more delicate flavour. Can recommend.

Birds left ours alone for a decade, but once they discovered the fruit, they live in there from November through December (AU) relentlessly picking off the ripening ends of each fruit.

A bigger concern with mulberry trees may be their allergenic properties.

[msrenee]

I'm fuzzy on mulberry distribution and don't feel like hunting the info down, but different species are native, introduced, or invasive in different regions. If you're going for native, you'd want to look into what belongs in your area.

[pvaldes]

Both, white and black mulberries are Asian trees, so be aware that you are replacing a Chinese pear by two Asian species of mulberry. The red mulberry is the one from US. The Texas mulberry is also from US but not so common in the market (probably).

White has a cultivar named Morus alba 'Fruitless' that is often used in cities. You can ask for it if you want a tree that will not stain the pavement.

The normal tree with fruits is a birds magneto but is a medium-big tree. Use it if you can provide the space necessary.