nature

In this video, I tell some facts about Anna’s Hummingbirds. Some facts are very surprising! Hummingbirds are amazing animals, and I hope more people will appreciate them. https://www.youtube.com/watch?v=wGdbdSFleqs

Image of Passenger Pigeon via WikiMedia River of feathers Crossing the sky May not see it ever again Beating wings Whoosh up high May not hear that ever again A winding brown-blue cloud of Passenger Pigeons covered the sky, wings whirring in a roaring river of sound. Less than 50 years later, the last passenger pigeon fell to the ground, heart still, from her perch four inches above the ground. In the 1800s, 40% of all North American birds were Passenger Pigeons. Passenger Pigeons, or simply Wild Pigeons, were the most plentiful bird in North America by far, and were easy to shoot. Their squabs, or fledglings, were served in pigeon pies. Most people thought these social birds were protected by their numbers, until the last pigeon, Martha. Martha was bred and raised in captivity by Charles Whitman, a zoologist. He had a collection of various species of pigeons and doves that were initially kept for studying their behavior. Martha was named after George Washington’s wife, Martha Washington. One of the males Martha was kept with was named George. Whitman partnered with the Cincinnati Zoo, recognizing the Passenger Pigeon numbers were on a sharp decline. Whitman’s collection of Passenger Pigeons were the only known surviving pigeons. Martha and the males she was kept with were sent to the zoo. In 1907, Martha and the two males were the only surviving Passenger Pigeons. Attempts to breed Martha were unsuccessful, and both males died in the following years. Martha was the only Passenger Pigeon, an endling. The zoo frantically tried to find mates for her, offering $1,000 to anyone who could capture a live male pigeon. No one ever found Martha a mate, and Martha got older each year. Visitors crowded around her pen, eager to get a glimpse of the last Passenger Pigeon, who was often perched on a branch in her enclosure. What were the visitor’s thoughts when, not long before, farmers would draw their guns at the sight of thousands of birds descending upon their crops, devouring all the grain in a matter of hours? In 1911, Martha suffered an apoplectic stroke, and she was severely weakened. In the following months, worried zookeepers had to lower her perch for her to be able to flap up to it. In the end, Martha’s perch was barely above the ground. On September 1, 1914, at 1pm, Martha breathed her last, and fell lifelessly onto the cage floor. The Passenger Pigeon was extinct. Martha lived an astounding 29 years; most pigeons in captivity live up to 17 years. As soon as the zookeepers found her dead on the cage floor, she was brought to the Cincinnati Ice Company and packed into a 300 pound block of ice. She was sent by an express train to the Smithsonian, and arrived there three days after her death. Martha was molting when she died so she was missing some of her long tail coverts. William Palmer skinned the pigeon and Nelson Wood mounted her skin. Four years after Martha’s death, in her previously vacant cage, was the last Carolina Parakeet, Incus. Incus died in the same cage as Martha. In observance of the Passenger Pigeon’s day of extinction, September 1, 2014, Martha’s mount was brought out on public display at the museum. There are many questions to be asked about Martha and the Passenger Pigeons in general. Why didn’t Martha breed? Were the captive pigeons somehow negatively affected by not seeing many other pigeons? Why didn’t the pigeons survive in smaller flocks? First, the nature of Passenger Pigeons should be discussed. They lived in huge flocks, up to half a billion strong. John James Audubon, a nationally renowned Ornithologist, describes the flock as, “The air was literally filled with Pigeons; the light of noon-day was obscured as by an eclipse, the dung fell in spots, not unlike melting flakes of snow.” Ironically, there is a saying that “The ornithologist’s greatest tool is a gun.” Audubon shot and killed all the birds he painted, including Passenger Pigeons. Passenger Pigeons bred near the Great lakes. The male had a pale blue head, nape and wings. Its chest and was peach, and it had an iridescent bronze patch on the sides of its neck. Its secondaries, or innermost flight feathers, were dotted with black and its primaries, or outermost flight feathers were dark gray. It had dark gray tail coverts, or top-of-the-tail, and a white undertail feathers. The female was a brownish shade, but overall the color patterns were similar to the male. Passenger Pigeons fed on fruits and insects and could fly up to 62 miles per hour. At the population’s peak there were about five billion pigeons, more than humans at that time. Since so many were shot, about 50,000 birds each day, and their habitat was being destroyed, evolution couldn’t keep up with the pigeon’s ever-shrinking population. Eventually, when there were only small flocks left, this hyper-social bird did not know what to do. Before they were all killed, they were used to being protected by numbers and since the population had been sectioned into small flocks, other predators like Peregrine Falcons could pick the birds off easily. So, is this why no small flocks remained? We can’t know for sure, but it is the most probable answer. Why didn’t Martha breed? In the wild, there were many male Passenger Pigeons to one female. A plausible answer is that Martha had a mutation that prevented her from breeding. It could also be that captive pigeons were somehow affected by not seeing many other pigeons, making them behave unlike wild pigeons. But the most likely answer lies in…flamingos. Flamingos’ mating drive does not trigger if the flock is too small. No one knows why this happens, but it could be to prevent inbreeding. This might have been the case with Passenger Pigeons. Martha was in a group of only three pigeons, but in the wild, each flock is over a million strong. Like flamingos, this