How do wings of insects differ from wings of birds?

Windows of insects differ from the wings of birds in that they have no features. They use a thin membrane to catch the wind.
the wings of a bird are made out of feathers and creates a shaped across its length like the wing of an airplane, a cross section of the wing, is seen to cause lift from aerodynamics of their shape described above. Since the air creates lift when it has to go faster over the top of the wing than the bottom; this phenomenon of air going at different speeds, cause the lift in the wings of a bird wing. (Or as seen in an airplane wing) Also, birds create jumps in their flying ability when they push their wings down with muscular thrusts while fullly opened, and pick their wings back up high with a light, but quick, easy but with a punctual rhythm of wing lifting that coincides with perfectly with downward flaps, which cause lift and initial velocity/height. Birds have amazingly strong control over how they fly, much more than insects.

Insect wings are made out of rigid cells but are delicate if damaged. They rely on fast flapping to create lift, they don't glide as much using open wings like birds. For insects, if they are flying, they are nearly always flapping their wings, and usually with quite a speed of frequency that is much faster than birds.

The wings of insects consist of simple membranes of chitin. Bird wings are bone-and-muscle limbs covered in feathers. With the exception of flies, insects have four wings. Birds have two.
Bird and butterfly wings have tremendous differences, a bird's wings are made of bone, skin, and feathers whereas a butterflies wings are made of membranes stretched between hollow tubes that protrude from the butterflies body. Instead of feathers, butterflies have colored scales covering their wings. Also a birds wings are an adaptation of their front legs with leaves them with two legs for walking and two wings, a butterfly has six legs for walking and two wings which are not an adaptation of their legs.