When do white birch (Betula papyrifera, aka paper birch) transition from their young (reddish, coppery-colored) bark, to their mature (white, exfoliating) bark? There are some times when it’s fun and interesting to talk about “why” they happen, and I also want to talk about just how cool it is that things happen — period. In this case, I don’t know if there is some rule of thumb about when or why white birches change from their immature bark to their more mature, characteristic bark — all I know

70K views · 730 reactions | #Fun Facts - Saviez-vous que Ladybug entrera au Musée Grévin en 2018 ? Retrouvez-là dans la série d'animation Miraculous : Les aventures de Ladybug et Chat Noir !  | AlloCiné | Facebook

7.8K views · 1.5K reactions | How can you tell gray birch (Betula populifolia) from white/paper birch (Betula papyrifera)? After sharing my video about the ecology of gray birch from this weekend, a lot of people asked me about how to tell the difference between white birch and gray birch. Fortunately, I had enough footage to create an additional video about just that! Enjoy! #tree #trees #birch | Ethan Tapper | Facebook