Zovala izi zimapanga chisindikizo cholimba kwambiri ndipo zimapereka chotchinga chabwino chamankhwala. Liner iyi imadziumba yokha mozungulira madera osindikizira kumapeto pomwe kapu imayikidwa, ndikuchotsa kutayikira, kutulutsa mpweya, kuipitsidwa, kumangirira ndi kubwerera kumbuyo. Zabwino pachilichonse kuyambira zamadzimadzi, sopo, mpaka ma macro-invertebrates.