Creationism and Intelligent Design is the best possible evidence for the Non-existence of god

fossils show that Dragonflies started out very similar to hummingbirds, with only one wing on each side that beat many times every second. The development over time of an additional second, heretofore vestigial, wing on each side allowed the then-eagle-sized (~6-ft wingspans) insects to conserve more of their energy, as with TWICE as many wings, it only was necessary to flap them HALF as often for each beat-stroke.

The same was true in our own development. Our ancestors were one of two varieties of great apes to descent form the trees (of African forests that were shrinking into Savannah’s due to climate shifts several million years ago.)

One kind developed into what we know today as Baboons and mandarins; the other ventured out onto the growing Savannah, developing knee joints that could lock in a straight position (ape’s knees can’t, so they must walk bow-legged, which is more exhausting of more energy).

[see: Lucy, and the recent Ardi discovery).

This allowed our ancestors to see up and over the tall grasses of the plains to scan for threats or for potential food sources.This adaptation also freed their front limbs, which developed more dexterous finger, and opposable thumbs separate from the other four; which could then be used to more accurately grasp objects picked up off the ground, or out of overhead trees; be it fruit from a bush, or a long stick or heavy rock for use as a defensive weapon or tool.

Again, with each passing generation, those who were least well able to adapt to changing situations did not survive, whereas those with particularly advantageous variations which allowed them to adjust to changing conditions persisted to produce healthier and stronger prodigy; and in the process passing on the advantageous adaptations to the next generations.

Life on earth started in the water about 4 Billion years ago, with single-celled algae-like plants, which fed on our planets richly methane-saturated atmosphere; and the amoeba-like animals that fed on them. Plants spread to inhabit the land about 3 billion years ago, followed quickly by arthropods (insects); but animal life, for the large part, remained confined to the oceans, which soon became overly crowded with hundreds of different kinds of fish. Some of these fish developed from exoskeleton (like crabs and lobsters and octopus/squid; to grow backbone, or spine, and skeleton of first cartilage, and then calcified-rich bones. These first vertebrates, or "bony fish" out-competed the invertebrates, but were outnumbered by the cartilaginous fish, and crowded out. The quickly growing land-plants had developed photosynthetic chloroplast structures out of the watery chlorophyll fluid that had first filled their algae predecessors; and had begun introducing what was, at that time, a highly noxious pollutant in the Chlorofluorocarbon-abundant atmosphere of the planet: OXYGEN. The product was a third atmosphere, mostly nitrogen and water, but rich in oxygen and carbon-dioxide, good for plants. It also allowed the over-crowded-out bony vertebrates, to adapt to an amphibious lifestyle; mostly in the oceans, but coming onto land to breed and lay their eggs (much like modern-day green leather-backed sea turtles.)

These amphibious fish were known as Lobe-fins, after the FOUR rounded peripheral flippers. The shape of these limbs was unusual as well. Like today's sea turtles and seals; when they spent so much time in the water, they remained aerodynamic flippers; but because they had to crawl up onto the shore, they developed bony fingers inside their lobe-fins (like the fingers of a bat inside its wings); giving the flippers their extraordinary shape, and dexterity. These animals spent more and more of their lives on land, until they only returned to the water to breed and lay eggs, like frogs and salamanders. Eventually the fingered lobes extended into legs for walking, the scales hardened to trap in moisture; and the amphibious lifestyle was no longer necessary: the first reptiles had come int being, a branch of the tree of life that, by 300 Million Years ago, had grown to dominate the planet: as the Dinosaurs, (literally meaning "thunder lizards").

Dinosaurs became birds as follows:

Certain different species of small bipedal carnivorous dinosaurs (appropriately enough called "raptors", meaning "birds of prey") evolved to feed on insects (such as dragonflies the size of present day red-tailed sharp-shinned hawks); in order to catch their prey, they became very light on their two hind feet, running fast and being able to jump high enough to snatch flying bugs out of the air. As the temperature of the climate fluctuated, many species of dinosaurs developed hairs on their skin, (similar to the fluff-like fur that covers bird hatch-ling chicks)
These smaller raptor-like lizards soon adapted this fur to grow longer, allowing more aerodynamic design for speed and maneuverability; They also learned to climb up the trunks of the giant trees (similar to the redwoods and Sequoia of today) and out onto the branches, in order to catch perching insects and other small creatures (including the tree-nesting shrew/rat-like ancestors of all modern mammals)
the hairs on their limbs assisted them in this, and soon grew longer on their fore and hind limbs.

(see: feathered dinosaurs, or four-winged lizard)

There soon became another, more energy-efficient method of getting from tree to tree, using the elongated "feathers" on their four limbs to glide amongst the canopy, rather than running about on the ground. This conserved more of their energy for hunting, and allowed them to even occasionally snatch bugs that flitted between tree branches.
(See: Archaeopteryx ["feathered lizard"])

The species that did not die out developed more and more “feathers” on their arms, and their legs, less necessary for climbing trees, grew shorter, with more pronounced toes and gripping talons instead of feet with claws for running.
And THAT is how the first birds came into being; a slow, gradual process of one beneficial adaptation after another; as those without the necessary “variations in design” (mutations) died out over the generations; and those with the required adaptations survived longer and better in order to produce more, stronger, and healthier offspring, thus passing on their particular variation of adaptation to their prodigy.