An adult North American porcupine has about 30,000 quills that cover almost all of its body. The quills are hollow and used primarily for defense, but also serve to insulate their bodies during winter.6yr ⋅ Nipru ⋅ r/WatchandLearn
Crown shyness in tree canopies is hypothesized to be due to high winds causing abrasion between tree leaves damaging them and killing the overlapping leaves off6yr ⋅ Nipru ⋅ r/WatchandLearn
