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--- chickens [2021/06/14 03:05]
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+++ chickens [2022/11/09 04:42]
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 The chicken is the first bird discovered to have its genome sequenced, allowing poultry farmers to more easily identify the most productive strains. [([[https://www.genome.gov/12514316/2004-release-researchers-compare-chicken-human-genomes|Genome]])]
-{{tag>Animals Birds}}
+==== Specific clucks====
+With the help of specific clucks, hens can not only warn the flock of a predator or call out to the food they have found, but also show emotion. [([[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5306232/|National Library of Medicine]])]
+==== Life expectancy ====
+The world's oldest hen lived to be 22 years old. In the wild, hens live about 10 years, but in industrial breeding, broilers die at about 6 weeks, and layers at 1.5 years. [([[https://www.four-paws.org/campaigns-topics/topics/farm-animals/life-expectancy-of-chickens|Four Paws]])]
+==== Eating ====
+Hens know how to refrain from eating a treat if they know it will give them a bigger reward in the future. [([[https://www.mannapro.com/homestead/treating-your-chickens-right|Manna Pro]])]
+==== Sensitive to pain ====
+A chicken's beak is sensitive to pain. Despite this, farmers trim chickens' beaks without anesthesia to reduce the mutual mutilation of crowded and stressed animals. [([[https://www.avma.org/resources-tools/literature-reviews/welfare-implications-beak-trimming|AVMA]])]
+==== Sensitive to pain ====
+The quail clucks to her chicks even before they hatch from the eggs. What's more, the chicks also squeal to her and to each other to synchronize hatching time. [([[https://www.audubon.org/news/the-art-hatching-egg-explained|Audubon]])]
+==== Rooster dance ====
+To get the hen's attention, the rooster performs an elaborate mating dance consisting of appropriate steps, sounds, and head movements, lifting and dropping food in the process. [([[https://opensanctuary.org/introduction-to-rooster-behavior-part-i-dismantling-rooster-stigma/|Open Sanctuary]])]
+==== Mating ====
+In choosing a mate, a hen pays attention to the size and color of the comb on her head: the larger and brighter, the better. Also of great importance is the place of a given rooster in the hierarchy of the flock and the mating dance he presents. [([[https://www.backyardchickencoops.com.au/blogs/learning-centre/chickens-in-charge-a-guide-to-the-pecking-order|Backyard Chicken Coops]])]
+==== Body language ====
+Roosters show gallant behavior toward their favorite hens - they cover them from the rain with their own wings and share their food. [([[https://thecountrysmallholder.com/country-smallholding/chicken-body-language-6260096/|Country Smallholding]])]
+==== Egg hatching ====
+When a hen hatches her egg, she turns it up to 50 times a day to make sure it is evenly heated. [([[https://the-chicken-chick.com/caring-for-broody-hens-facilitating-egg/|The Chicken Chick]])]
+==== Social life ====
+Hens like some individuals in the flock more than others. When they find food, they lead their closest friends to it first. [([[https://www.upc-online.org/thinking/social_life_of_chickens.html|United Poultry Concerns]])]
+==== Numbers ====
+The domestic hen is the most numerous bird species in the world - its global population is about 25 billion individuals. [([[https://www.birdspot.co.uk/bird-brain/what-is-the-most-common-bird-in-the-world|Bird Spot]])]
+==== Heartbeat ====
+A chicken's heart beats between 220 and 360 times per minute. In comparison, the human one makes no more than 100 beats in that time. [([[https://sorrychicken.com/cool-chicken-facts|Sorry Chicken]])]
+==== Dreaming ====
+Hens, like humans, have good and bad dreams. [([[https://www.worldanimalprotection.org/blogs/surprisingly-sweet-animals-11-facts-about-chickens|World Animal Projection]])]
+==== T-Rex relative ====
+The domestic chicken is one of the closest living relatives of the tyrannosaurus. [([[https://www.smithsonianmag.com/science-nature/t-rex-linked-to-chickens-ostriches-180940877/|Smithsonian Mag]])]
+==== Understanding ====
+Even two-day-old chicks are aware that a thing does not cease to exist when it disappears from their field of vision. It takes human children about seven months to understand this fact. [([[https://www.peta.org.uk/blog/21-surprising-facts-about-chickens/|PETA]])]
+{{tag>animals birds fauna}}

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