Orgy lifestyle of the American Carrier Pigeon

There was this band of little winged creatures that numbered the same as all the people in the world today.  On outward appearances, they looked like any other pigeon, but their mindset and instincts, had evolved to live in massive hoards, and live an orgy lifestyle when it came to procreating.
 
They would fly in a great cloud over cities, blocking out the sun for hours, making the citizens below wonder at the great masses of wonderful treacherous birds.
 
The pigeons would land and fill a giant forest and begin mating with each other in a great orgy like a giant mega night club gone wild
 
The mothers laid their eggs and the mothers all shared in sitting on the eggs to warm them.
 
The winged people were vulnerable, open at this time to the hungry mountain lions, the foxes, the cats, dogs, pigs, the wild indians,
all would come to fill their stomachs with hundreds of the winged people, eating them for an easy snack, but once their bellies were full, and after killing hundreds more for later,losing a hundred million to the predators, it was a small price to pay for the other  7 thousand million who lived on to lay 7 thousand million new eggs to continue their species.  
 
Soon the chicks were hatched, and began to grow, and even before they were old enough to fly, the grown winged people would take to the skies to leave their children because, the predators would get some, but there were so many, so most of them lived to fly.
 
 
And so the medieval villages would experience the great hordes of these highly successful birds whose lifestyle was of the great orgy.  A villager would one minute see his tree empty, then in another, would be full of a thousand birds, resting, pecking the ground for food, gobbling all the apples off the trees, eating all the crops, and then swoosh, the great mass would take to the sky.
 
What you and I see today, when a flock of birds take flight, would be like a  period at the end of this sentence, a little dot, compared to the vastness of the flying winged little people, who would darken the whole sky, not with just a layer, but with many layers of flying birds.
 
And thus life continued since the dawn of the species of birds, until, well, until the year of 1800 A.D.
This is when the little winged people met their end.  We as human beings can be sober of this,
a superior race, numbering seven thousand million people, how could we ever come to an evolutionary end?
 
I was reading about the carrier pigeon, and learned that they flew in great hordes, and travellers who saw them, either refused to tell their home country about them, out of a  certainteed knowledge that they would be ridiculed as totally nuts.  
and those who did try and describe it, and indeed were thought mad.  
 In the 'new world', by about 1800, as industrialization caught on, more and more hunters used commercial scale hunting to set up great nets, to have people working full time, out in the woods to strip and salt the little bodies to be shipped back for 'slave food', as it was so cheap.    
 
They even had pig farmers come in and bring their pigs to gobble up the swarms while they landed and were mating.    
After about seventy years of this, at some point, the carrier pigeion population had dwindled to where there was not a 'critical mass' of birds to trigger them into their wild orgy mating ritual, and they simply stopped reproducing.  
 
And so a bird that once had populations in the tens of billions, became extinct by around 1900 A.D.  
I had some hints of worries, how the human race, numbering some 7 billion, might some day face extinction by some strange twist of the future.  
That twist started with the downfall of VW,  
Which, given that one out of seven germans work for car companies, their economy imploded, begging Greece for a bailout. Then Donald Trump was elected, built a giant wall, and it fell over
triggering a massive quake that caused the north american continent to slide back under the sea.
 
Nuclear submarines fought china in a war for real estate but the chinese won however the nuclear winter made only the eskimos to survive.  The world population has now been reduced to 2300 eskimos north of the arctic circle who say ,"New clear winter? What new clear winter?"