No. They're different (though related) species, and the nuts themselves look quite different. For one thing, the shell of an English (or Persian) walnut is a light brown, where the shell of a black...
You will find most nuts are ripe right about the time of first frost. But to be sure watch the squirrels. They will tell you when the nuts are ripe. I will bet they will get more than you do. You...
The population of Walnut Creek, California on December 15th 2011 is approximately 64,169. (Extrapolated from a 2000 US census population of 64,296 and a population of 64,173 on July 27th 2011.)