This habit may help reduce food competition and avoid attracting predators.īoth males and females have been known to destroy unguarded bluebird and other cavity nester'sĮggs by piercing them (holes of 3 mm or less, or a large ragged hole in the middle). TheyĪre prolific, curious, and aggressively territorial during nesting
House Wrens ( Troglodytes aedon or HOWR) are small, brown,Ĭommon, native, insect-eating birds with a cheerful song (although it can become grating when repeated at two second intervals). If you allow House Wrens to use your boxes, I predict you will regret it in time. Avoid slot boxes and gourds, and do not crowd single boxes together. Try a wren guard DURING EGG LAYING (and do not wait till you hear House Wrens - put it up right after the first egg is laid for boxes near House Wren territory).
Quick Tips: Put nestboxes at least 50 and preferably 200-300 feet away from brushy and heavily wooded areas, especially away from areas House Wrens have used in the past. However, BE ADVISED that the HOWR is a native bird and it is illegal to harm them in any way or to interfere with active nests.Īlso see All About House Wrens, Photos of Nests, Eggs and Young, Another Perspective on House Wrens, Predator ID, VIDEO of HOWR egg attack, video of HOWR removing newborn bluebirds from nest, and Other Brown Birds. Some bluebird trail monitors wish to deter HOWR from using their boxes because of the havoc they can wreak, and this page provides advice on various approaches. Guard, and haven't seen House Sparrows around? With no other signs, even though you have a predator Click on nest thumbnail for larger version.įilled to bursting with sticks and twigs? Missing eggs, or pierced/broken Above, a House Wren removes a Tree Swallow nest after taking out the eggs.
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