No Mutants Allowed

For strange reasons, I have an abnormally large balcony, 4th floor, so it's ideal for birdlings raising, hiding, feeding in a wall vent - but not ideal for fledging; they're very exposed to crows, magpies, gulls - although the nearby thrushes are excellent allies, 3 times during today, they swooped and chased aerial predators away

Parent tits came by all of today feeding the two, until one of them flapped onto the railing, enjoyed the view for maybe half an hour, then leapt into the forest below, parents in chase

The second struggled to make the same move, but did get onto the railing, only to stumble down to the balcony again, and thereafter never really caught on to it (the whole rail/wall construct is tricky, and bird tries up fly straight up it, which won't work, there's an edge, then another one - parents can do it easily, cus they're skilled)

Parents swung by regularily to feed, but also to encourage to follow, all w blue skies, but soon clouds formed everywhere, and rain started pouring, so I wrapped a box in plastic tarp, set it sideways, made a slim opening, and placed it under a chair - back to the rail (help for flying practice tomorrow, if the weather clears)

it failed to understand the meaning of the box for a long time, trying to shelter from the rain under random plastic wrinkles, or under the slimmest margins along the balcony wall/rail, but rain's forecasted for the night, and eventually the parents also took to the forest for the night - their nest officially abandoned