Basically, any bird that also nests in cavities. These often include bluebirds, other swallows, wrens, and house sparrows.
Not in one where the bluebirds already are nesting, but wrens are cavity nesters, and will nest in unoccupied bluebird houses.
It is very common for House Wrens to remove baby birds of other species from their nest before they get too heavy for them to pick up. Usually after about 4-7 days of development, the babies are safe from a House Wren due to their weight. House Wrens will often Take out the babies and drop them to the ground, and then either build their own nest or simply disappear. House Wrens however are a protected species and therefore they and their eggs/babies cannot legally be harmed.
Yes. They eat lots of bugs and spiders, helping to control these populations, and drop a little fertilizer as they go. These birds also provide food to a wide range of predators, including other winter wrens who sometimes raid nests.
White eggs thickly speckled with brown
wrens warble
Generally house sparrows and house wrens. Both are cavity nesters and will compete with bluebirds for nesting spots.
I have two house wrens who sleep on a ledge under our deck every night. They turn their faces to the wall & their little tails hang over the edge. Very cute. I've seen pictures of other wrens doing the same. I've also read about them finding warmer places to snuggle like the pockets of clothes that are hanging outside, haystacks, etc.
Wrens are naturally completely insectivorous.
Wrens are a type of bird. Wrens can also refer to members of the former Women's Royal Navy Service. It is also a surname.
North American Wrens which there are 9 types, are secretive. They (House Wren, Carolina Wren, Rock Wren, Canyon Wren) will nest in holes, trees and birdhouses. The Marsh Wren makes a globe-shaped nest which are attached to plants just above the water. Cacus Wren builds a nest shaped like a football in cacti.
A group of wrens is called a flock or herd