March 28, 2017 at 8:23 am #3385dpurdueParticipant
Does anyone have any experience with the two hole nest box?
Seems like a good idea to me
I have trapped over 100 sparrows but the 20 or so that remain are still chasing off the bluebirds
Darrell in KCMarch 28, 2017 at 5:09 pm #3387tamseaModerator
Someone on here talked about getting or building one, I can’t remember who. And Fred knows a little about them. I’m not a believer yet. Yes, the adults have a second escape route but it also means that the House Sparrows have a second entrance route to get the eggs and babies. But, some people think they’re the best thing out there. Give it a try and see what you think.
- This reply was modified 6 years, 8 months ago by tamsea.
TammyMarch 28, 2017 at 9:06 pm #3400RiverParticipant
I spent two enlightening years corresponding with Linda Violett discussing the theory behind the 2-hole nestbox, and how it does succeed in reducing attacks from House Sparrows. As Tammy said, the main attribute of two holes is to provide a Bluebird with another way out of Dodge if a HOSP has stuffed itself into one entry.
Inside a nestbox, the House Sparrow will invariably defeat the Bluebird. If a Blue can take the fight outside however, its superior flying skills heavily tilt the odds against the sparrow. We’ve seen or heard of this when sparrows are foolish enough to attempt a box takeover when the adult Bluebirds are outside and nearby. I honestly don’t know if a Bluebird leaving the box to fight outside is pure instinct or a learned behavior. With 2 holes, they have a better opportunity.
For the longest time, 2-holers were an almost exclusive west coast thing, and most are hung in trees out there (2-legged predators warrant this hanging approach; I use this method myself at public parks). In 2016, I built as many 2-holers as I did Gilwoods, all of which were shipped east of the big river. I don’t think any of these were hung in trees. Seems the popularity of the 2-holer is growing, albeit slowly.
You don’t have to build or buy a Violett 2-Hole Mansion to get the dual entry. A lot of nestboxes can handle 2 entry holes as long as the front is at least 5 1/2″ wide, which covers a lot of box designs (Nabs style boxes and the new XBox for examples).
NestboxBuilderMarch 28, 2017 at 10:17 pm #3401dpurdueParticipant
I drilled a second hole on the side of the box-we’ll see what happens
Thanks for sharing your experience
The BBs are starting to visit my yard again and I happened to see a hosp had a BB trapped in the box (he or she escaped without harm)
Tammy -maybe the second entrance could be closed after eggs are laid and switch to a spooker or fishing line
Thanks for your advice too!
Darrell in KCApril 16, 2017 at 12:36 pm #3732phillybluesParticipant
Last year I tried normal sized boxes with an extra hole in the side and still had a bluebird killed. They succeeded in a similar box on the same property. This year I made a bigger box. I think the size matters so that a bluebird can fully extend its wings inside. Less chance of getting trapped.April 25, 2017 at 8:05 pm #3883tamseaModerator
Some people think that two holed houses are the way to go….so this is interesting. Thanks for sharing, Phillyblues.
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