Concrete nest boxes | The Bigg Bird Forum

Concrete nest boxes Apr 17, 2020 11:07:11 GMT WildlifePaul likes this

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Post by matt on Apr 17, 2020 11:07:11 GMT

Apr 17, 2020 10:23:50 GMT WildlifePaul said:

I wonder if thats why my sparrows love my box I have for them, Before under the hole on instead there a "ledge" that is around 5cm / 6cm long before they drop down into the nest part of the box.
That is the only difference with that box compared to a normal one, That is designed to offer extra protection because if a cat gets it paw in hole they can't reach into the nest part due to this ledge inside.

That's what I'm thinking Paul - it would be much more secure from cats paws, or bigger birds trying to get their heads in, and I'm sure that one way or another the blue tits can assess how secure a box is when they are checking it out.
If you look at www.schwegler-natur.de/portfolio_1408366639/nisthoehle-2gr-dreiloch/?lang=en on the Schwegler website you can see the way the hole is formed, with the ledge on the inside as you describe (so not a thin tunnel all the way in, but an extra step to stop paws reaching over). It also has the dimensions of the box inside, which are actually quite large (14x19cm) for this one. Is this the same as Sue's?