Who came first - Stock-Fotografie

After we came back from a long holiday, I was surprised to see a love nest of Pigeon in our balcony. They get puffed up and move in short circles to display love for each other. During our absence they had their peace of time and the result was two eggs in one of my flower pot. They build relatively flimsy nests from sticks and other debris and used mud from the pot as a base. I saw both the parents caring for the young, which leave the nest after seven to 28 days. Night time the Mother Pigeon use to hatch and lay them while the male use to do during the day time.Mother Pigeon is more aggressive and attacks us when we go close. However during her attack she gets filled with air with puffs chest and feathers at the nape of the neck to appear larger and cute. After some 17 days the eggs were hatched and two yellow babies came out. These birdies are known as Squabs. They have wing like limbs and eyes closed. We provided them with water and millet (Bajra). Later after 4 days of nestling I noticed a peculiar behavior; the young ones will put their beak and hang inside the nostril of their parent bird. Later I checked this behavior on the internet and came to know that Pigeon is a rare bird (Flamingo and penguins are other two birds producing milk) which produces milk and those young ones were sucking through the lining of crop. A crop (sometimes also called a croup or a craw, or ingluvies) is a thin-walled expanded portion of the alimentary tract used for the storage of food prior to digestion. This anatomical structure is found in a wide variety of animals and birds and is like a pouch.Both sexes of doves and pigeons produce "crop milk" to feed to their young, secreted by a sloughing of fluid-filled cells from the lining of the crop. Pigeon's milk begins to be produced a couple of days before the eggs are due to hatch. Crop milk bears little resemblance to mammalian milk, being a semi-solid substance somewhat like pale yellow cottage cheese. It is extremel