Things that Fly:
Living Things:
* Birds: Eagles, sparrows, penguins, hummingbirds, etc.
* Insects: Bees, butterflies, dragonflies, mosquitoes, etc.
* Bats: The only mammals that can fly.
* Flying Fish: These fish can "fly" by gliding over the water using their large pectoral fins.
* Flying Squirrels: These squirrels can glide from tree to tree using a membrane stretched between their limbs.
* Some Reptiles: Flying lizards and flying snakes exist, but they glide rather than true flight.
Man-Made Things:
* Airplanes: Commercial airplanes, fighter jets, helicopters, gliders, etc.
* Rockets: Used to launch satellites and spacecraft.
* Drones: Unmanned aerial vehicles used for various purposes.
* Hot Air Balloons: Large, inflated balloons that are lifted by heated air.
* Kites: Lightweight frames covered in fabric flown by the wind.
* Paper Airplanes: Simple crafts flown for fun.
* Gliders: Aircraft that glide without an engine.
* Parachutes: Used to slow descent from high altitudes.
* Skydivers: People who jump from high altitudes and use a parachute to descend.
* Hang Gliders: Aircraft where the pilot is suspended beneath a wing.
* Remote Controlled Aircraft: Model airplanes, helicopters, and quadcopters.
* Parasails: A parachute-like canopy towed by a boat.
Other:
* Seeds: Many plants have seeds designed to be dispersed by the wind.
* Dandelions: The fluffy seeds of dandelions are dispersed by the wind.
* Leaves: Some trees have leaves that are designed to be easily carried by the wind.
* Paper: A sheet of paper can be flown in the wind.
* Balloons: Filled with helium or air, they can float and be carried by the wind.
This is not an exhaustive list, but it gives you a good starting point. There are many other things that fly, depending on how you define "fly".