1. Flying in a "V" shape saves geese massive amounts of energy. When a goose flaps its wings, it creates an upward draft of air right behind it. By flying in a V-formation, each bird flies in the "upwash" created by the bird in front, allowing the flock to fly up to 71% farther than a single bird could alone!

2. Geese take turns leading the flock during long migrations. The lead goose at the very point of the V works the hardest because it breaks through the air first. When the leader gets tired, it drops back into one of the wings of the formation to rest, and another goose steps up to take the lead!

3. Honking during flight is actually encouragement. When geese honk while flying in formation, they aren't just making noise—scientists believe they honk from behind to encourage the lead geese to keep up their speed and to help the flock stay organized in foggy weather.

4. Geese have spiky "teeth" on their tongues. Geese don't have true bone teeth, but they have sharp, serrated ridges made of tough cartilage called tomenta along the insides of their beaks and on their tongues. These tooth-like spikes help them easily slice through tough grass blades and catch slippery seeds!

5. Ancient Romans used guard geese instead of watchdogs. In 390 BC, a flock of sacred geese living at the Temple of Juno in Rome famously saved the city from a surprise night attack! The alert geese heard invading soldiers sneaking up the hill, flapped their wings, and honked loudly to wake up the sleeping Roman guards.

6. Geese mate for life and are fiercely loyal parents. Once a goose finds a mate, they usually stay together for the rest of their lives (which can be over 20 years!). If one goose gets sick or injured during migration, its mate will often drop out of the formation to stay on the ground and guard it until it recovers.

7. A group of geese has three different names depending on where they are. A group of geese on the ground or in the water is called a gaggle. When they take to the sky in flight, they are called a skein or a wedge!