I like your idea!  Go for it!  What most people don't understand is that the House sparrow (passer domesticus) sometimes called the ENGLISH sparrow is a bird not originally found in the Americas.  It was introduced in New York city in 1850 and our House sparrow population has descended from these. It is an aggressive bird and has proliferated here to the point of overpopulation.  Its "song" is nothing but a monotonous chirping when compared to an actual song sparrow or warbler.  It competes with and takes prime nesting spots and food away from more desirable native birds; some that are on the verge of species survival.