Posts Tagged ‘hummingbird’
“The daily hummingbird assaults existence with improbability”*…
Zito Madu‘s lovely meditation on– and appreciation of– the hummingbird…
… Hummingbirds are wondrous creatures. As Katherine Rundell wrote in her 2022 essay “Consider the Hummingbird”:
There is nothing I admire more than evolution. But it’s difficult, more than with any other living thing, to imagine hummingbirds beginning as archaebacteria among primordial murk, painstakingly working over millions of years to grow bright wings. They seem as if they were made in an instant, a spark of genius from an extravagant god.
They are the smallest living birds in the world. There are 366 known species of hummingbirds, with the smallest being the bee hummingbird that measures at two inches, and the largest being the giant hummingbird, which is 9.1 inches long. Most live in the tropics, largely in Central and South America, but there are around seventeen species in the United States. They have long needle-like beaks, can fly forward, backward, up, down, and in zigzags. They flap their wings faster than any other bird, up to fifty times per second, they have the largest heart-to-body-size rate in an animal, and that heart has typically 500 to 1200 beats per minute, according to The Hummingbird Handbook (2021) by John Shewey. When in a state of deep rest, and to conserve energy, the hummingbird can slow down its heart rate to only fifty beats per minute, and drop its metabolism by 95 percent.
In 2022, a study was published by Yale scientists on the range of colors in the plumage of hummingbirds, which “exceeds the known diversity of colors found in the plumages of all other bird species combined, increasing the total of known bird-visible plumage colors by 56 percent.”…
“Hummingbirds are Wondrous,” from @_Zeets in @Plough.
* Ursula K. Le Guin, No Time to Spare: Thinking About What Matters
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As we appreciate abundance, we might send bucolic birthday greetings to Ralph Waldo Emerson; he was born on this date in 1803. An essayist, lecturer, philosopher, abolitionist, and poet, he articulated the philosophy of Transcendentalism in his 1836 essay “Nature.”
A mentor and friend of Henry David Thoreau, a fellow Transcendentalist, and remains among the linchpins of the American romantic movement.
“The daily hummingbird assaults existence with improbability”*…
High in the Andes, thousands of meters above sea level, speedy hummingbirds defy near-freezing temperatures. These tiny flyers endure the cold with a counterintuitive trick: They lower their body temperature—sometimes as much as 33°C [over 90°F] —for hours at a time, new research suggests…
Among vertebrates, hummingbirds have the highest metabolism for their size. With a metabolic rate roughly 77 times that of an average human, they need to feed nearly continuously. But when it gets too cold or dark to forage, maintaining a normal body temperature is energetically draining. Instead, the small animals can cool their internal temperature by 10°C to 30°C. This slows their metabolism by as much as 95% and protects them from starvation, says Blair Wolf, a physiological ecologist at the University of New Mexico, Albuquerque.
In this state, called torpor, a bird is motionless and unresponsive. “You wouldn’t even know it was alive if you picked it up,” Wolf says. But when the morning comes and it’s time to feed, he says, the birds quickly warm themselves back up again. “It’s like hibernation but regulated on an even tighter schedule.”…
One of Nature’s (many) marvelous tricks: “To survive frigid nights, hummingbirds cool themselves to record-low temperatures.”
* Ursula K. Le Guin, No Time to Spare: Thinking About What Matters
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As we admire adaptation, we might send closely-observed birthday greetings to Antonie Philips van Leeuwenhoek; he was born on this date in 1632. A largely self-taught man in science, he is commonly known as “the Father of Microbiology“, and one of the first microscopists and microbiologists (he discovered bacteria, protists, sperm cells, blood cells, and numerous structures in animal and plant tissues). A central figure in the Golden Age of Dutch science and technology, his letters to the Royal Society were widely read and richly influential… which is fair dues, as it’s widely believed that van Leeuwenhoek was inspired by illustrations in Robert Hooke’s earlier book, Micrographia [and here].
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