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Published on May 4, 2008
This oval hole keeps out invasive English House Sparrows and protects Violet Green Swallows from house sparrows . This 7/8 oval hole is too small for Blue birds and might be to small for Tree Swallows . Increase the oval hole 1/16 more for Tree swallows. Please give me feed back if you have Tree Swallows going into a 7 /8 oval hole . Another hole size to keep House Sparrows out is a 1 and 1/8 round hole . I have Red Breasted Nut Hatches using the 1 1/8 round hole . Any hole larger than the 7/8 oval or the 1 1/8 round hole needs to come with a warning as the hole will not keep House Sparrows out . questions/ comments / input email firstname.lastname@example.org or text or phone cell 250 812 6461 Malcolm Rodin Victoria B.C