Now that the second year (SY) martins are arriving I hope more landlords will get more Purple Martins. The House sparrows are a problem and every 3 days I pull out the huge nest. Eventually, I hope they will give up. They will not enter my trap S-Gourd. Today a House sparrow went into a Martin apartment. The Martin went after him and evicted him. House Sparrows and Starlings are nest competitors and are hard to deal with. Please read the PMCA Helpful Hints article.