見知らぬ鳥たちが、塀に飛び乗りやって来た。Unknown birds jumped up onto the wall and came to the backyard.
塀に飛び乗れるだけあって、もうずいぶん大きい。産毛がまだチラホラと見えるけど、シッポも、カンムリもしっかりしてる。They are already large enough that they can jump on the wall. Although I can see baby hair here and there, they already have solid tails and crowns.
それに比べると、うちの子達はまだ彼らの半分ぐらいの大きさ。まるで中学生と幼稚園児みたいだ。Compared to them, our chicks in the backyard are still so tiny, about half of their size. It looks like they are Junior high students, and our chicks are kindergarten kids.