Oh, that's a great addition as well, I didn't think of that. Yes, when holding a scarecrow, or bee hut, you also see all other items that have a reach feature (scarecrows, huts, and beehives are the only three, right?) in a glowing green radius highlight. Given that bee huts have a small reach, you can hold one of them to study how well the scarecrows are covering the farmland. That gets rid of the issue that you can only see the scarecrow area when holding it. There is a small downside that your beehive reach would be hidden by a scarecrow reach, but I think that's a minor issue, and it's more helpful to see all the reaches.