I did some "research" while I was working on it, and the supposed reasons for them only flying last second was your explanation and also that they'd rather conserve energy by just walking (I am not an expert on this topic).If I'm remembering correctly, which is doubtful, pigeons don't fly away from danger because they see the world at such a high frame rate that the entire world is basically in slow motion for them.
And they're really convinced that they always have plenty of time to get away from any danger. Even if they are actively being run over or eaten.
as long as it doesn't take a "Hatoful" turn 8D;so pigeon is the dumbest bird that they even forget the basic stuff they can do?
This is really cute, this could become a really nice slice of life, imagine more bird girls annoying nadoka