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There is nothing special about this, if you don't want this, you can drive the birds away and deal with that position to prevent birds from coming to make nests in the future.
The blackbird (scientific name: Turdus merula) is a bird of the family Thrush family, found in Europe, Africa, and Asia, and often inhabits the periphery of forests, on the edges of small towns and villages, and even in melon fields, as well as in plains, gardens, trees, and sometimes near garbage dumps and latrines. It is an omnivorous bird whose diet consists of insects, earthworms, seeds, and berries. >>>More
The current avian flu virus is different from the previous avian flu virus, it is mostly targeted at men who smoke, and birds are not contagious, and even if they do, they will not have time to infect you.
Find a master carpenter and design it!
It is not suitable for installation, and most of the designed balcony sewer pipes are used for rainwater drainage on the top floor and the drainage of the balcony floor drain or laundry sink on the top floor.
If it were me, I would wrap it in light-toned wallpaper and paste some butterflies or birds, or simply wrap it around a fake flower vine.