In March 2014, a couple of pigeons decided to build a nest on my windowsill. Though pigeons are probably the most common bird in the world, I realized that I didn't know much about them. So, I took this as an opportunity to study their behavior by carefully documenting day-to-day events.
March 2nd - March 4th
The pigeons sat on the windowsill for 6-8 hours each day, making loud cooing noises. I believe that this behavior was to check whether the location was safe from predators. Both pigeons left before nightfall.
March 4th - March 9th
One pigeon started to bring twigs and sticks to the windowsill and the other pigeon would arrange them in overlapping triangles to make the frame of the nest. They would spend the whole day building the nest, and leave by nightfall. By the 9th, the nest was finished.
March 10th
One of the pigeons spent the night sitting in the nest.
March 11th
I checked the nest in the morning and saw a single white egg. It was about 3-4 cm long.
March 12th
A second egg was laid.
March 13th - March 27th
Both pigeons incubated the eggs in 4-6 hour shifts. While one pigeon was sitting on the eggs the other would forage for food. They didn't make much noise at this stage.
March 28th
The first egg hatched. The chick was covered in yellow hair and no feathers were visible. Its eyes were closed and it didn't make any sounds. It was about the size of a table tennis ball.
March 29th
The second egg hatched. This chick was a little smaller than the first one. The adult pigeons threw the eggshells out of the nest.
March 30th - April 3rd
The pigeons continued to sit on the chicks. They fed them by regurgitating (vomiting) into the chicks' beaks. Adult pigeons produce a protein similar to milk in their crop (the first part of the digestive tract). This protein mixes with whatever the pigeon eats and forms a substance called "crop milk" which is used to nourish the chicks.
April 4th
The chicks opened their eyes. The adults continued to feed them crop milk.
April 6th
The chicks started to cry and beg for food every time an adult came back from foraging.
April 7th - April 17th
The chicks increased in size. Grey feathers started to replace the yellow fuzz, except for on the head.
April 18th
I found the carcass of one of the adult pigeons in the yard outside the window. When I took a closer look, I found that a cat had killed it and eaten its head and organs. I buried the remains. I couldn't tell the gender of the dead bird but the remaining bird continued to care for the chicks, at least one of them. The pigeon was feeding only one of the chicks, the bigger one. It pushed away the smaller chick whenever it begged for food. I think this is because it knew it could not raise both chicks without the help of another pigeon, so it chose to raise only the stronger chick and abandoned the weaker one.
April 19th
The smaller chick died of starvation and its body was left in the nest. The other chick sat right next to it as if it was still alive. The adult pigeon made no effort to remove the carcass from the nest, so I took out the carcass and buried it.
April 24th
The larger chick was trying to learn how to fly so it was walking up to the edge of the windowsill and peeping over, afraid to jump off. Unfortunately, when it finally did decide to jump off, a Black Kite flew out of nowhere and snatched the chick in its talons. The Black Kite is a bird of prey that feeds on small birds, rodents and carcasses.
April 25th
I saw the remaining adult pigeon sitting on the windowsill. It took one last look at the nest and flew away and never came back.
Though this whole episode had been sad and tragic, I'm fortunate to have been able to watch it unfold. It had started off with 2 pigeons, which then became 4 and in the end just 1. This just shows the awe inspiring and unforgiving power of nature. It shows that not every animal story has a happy ending but they are all amazing nonetheless.
March 2nd - March 4th
The pigeons sat on the windowsill for 6-8 hours each day, making loud cooing noises. I believe that this behavior was to check whether the location was safe from predators. Both pigeons left before nightfall.
March 4th - March 9th
One pigeon started to bring twigs and sticks to the windowsill and the other pigeon would arrange them in overlapping triangles to make the frame of the nest. They would spend the whole day building the nest, and leave by nightfall. By the 9th, the nest was finished.
March 10th
One of the pigeons spent the night sitting in the nest.
March 11th
I checked the nest in the morning and saw a single white egg. It was about 3-4 cm long.
March 12th
A second egg was laid.
March 13th - March 27th
Both pigeons incubated the eggs in 4-6 hour shifts. While one pigeon was sitting on the eggs the other would forage for food. They didn't make much noise at this stage.
March 28th
The first egg hatched. The chick was covered in yellow hair and no feathers were visible. Its eyes were closed and it didn't make any sounds. It was about the size of a table tennis ball.
March 29th
The second egg hatched. This chick was a little smaller than the first one. The adult pigeons threw the eggshells out of the nest.
March 30th - April 3rd
The pigeons continued to sit on the chicks. They fed them by regurgitating (vomiting) into the chicks' beaks. Adult pigeons produce a protein similar to milk in their crop (the first part of the digestive tract). This protein mixes with whatever the pigeon eats and forms a substance called "crop milk" which is used to nourish the chicks.
April 4th
The chicks opened their eyes. The adults continued to feed them crop milk.
April 6th
The chicks started to cry and beg for food every time an adult came back from foraging.
April 7th - April 17th
The chicks increased in size. Grey feathers started to replace the yellow fuzz, except for on the head.
April 18th
I found the carcass of one of the adult pigeons in the yard outside the window. When I took a closer look, I found that a cat had killed it and eaten its head and organs. I buried the remains. I couldn't tell the gender of the dead bird but the remaining bird continued to care for the chicks, at least one of them. The pigeon was feeding only one of the chicks, the bigger one. It pushed away the smaller chick whenever it begged for food. I think this is because it knew it could not raise both chicks without the help of another pigeon, so it chose to raise only the stronger chick and abandoned the weaker one.
April 19th
The smaller chick died of starvation and its body was left in the nest. The other chick sat right next to it as if it was still alive. The adult pigeon made no effort to remove the carcass from the nest, so I took out the carcass and buried it.
April 24th
The larger chick was trying to learn how to fly so it was walking up to the edge of the windowsill and peeping over, afraid to jump off. Unfortunately, when it finally did decide to jump off, a Black Kite flew out of nowhere and snatched the chick in its talons. The Black Kite is a bird of prey that feeds on small birds, rodents and carcasses.
April 25th
I saw the remaining adult pigeon sitting on the windowsill. It took one last look at the nest and flew away and never came back.
Though this whole episode had been sad and tragic, I'm fortunate to have been able to watch it unfold. It had started off with 2 pigeons, which then became 4 and in the end just 1. This just shows the awe inspiring and unforgiving power of nature. It shows that not every animal story has a happy ending but they are all amazing nonetheless.