Zvinotevera ndezvimwe zvinhu zvatakaitira vatengi vedu, sezvamunoona, kudhinda siriki kunowanzova nemavara 1-3, uye mavara maviri ane daro. Daro rinowanzova kupfuura 3mm.
Kudhinda sirika kunoda kuti bhodhoro/chirongo chive chakatsetseka, chakati sandara, tinogona kudhinda sirika panguva yekupisa kwakanyanya (nguva inochengetwa yakareba, asi ruvara rwacho rwakareruka zvishoma) uye kudhinda sirika panguva yekupisa kwakaderera (zvinotaridzika kunge zvakapenya).
