Bait hives

[Erichalfbee]

I have a couple of big trees that look ideal for bait hives... they are a bit open to he element and can get windy as it's flat round here will these be ok for more bait hives?

Have you no flat roofs?
I’m thinking of ease of retrieval here

 

[simonforeman]

I have 8' flat yew hedge that's 3' wide could I put on top of this?