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Turkey (bird)

life science Maturity 5-7 Next article →

Turkeys are large, heavy birds belonging to the genus *Meleagris*. They are indigenous to the Americas and are among the heaviest birds in the order Galliformes.

1 Wild Turkey
1 Wild Turkey

These birds are members of the family Phasianidae, which includes pheasants and grouse. There are currently two living species of turkey. The wild turkey (*Meleagris gallopavo*) lives in Southern, Central, and Eastern North America. The ocellated turkey (*Meleagris ocellata*) lives in the Yucatán Peninsula of Mexico.

Meleagris ocellata1
Meleagris ocellata1

One of the most interesting parts of a turkey is its unique anatomy. Males possess a fleshy, erectile protuberance on the forehead called a snood. This snood is one of several small, fleshy bumps known as caruncles.

Anatomy of turkey head
Anatomy of turkey head

When a male is relaxed, the snood is pale and measures only 2 to 3 centimeters. However, during courtship displays, the snood engorges with blood. It becomes bright red and elongates several centimeters, hanging well below the beak. This physical change serves two important biological purposes. It helps attract females and allows males to establish a social hierarchy.

Scientists have studied why the snood is so important for survival. Research shows that the snood plays a role in both intersexual and intrasexual selection. This means it helps in choosing mates and competing with other males. Studies of wild turkeys found a link between snood length and health. Males with longer snoods often have lower levels of intestinal coccidia, which are harmful parasites.

A study of 500 males showed that longer snoods correlate with better immune system function. These birds seem to have more red blood cells, which helps them fight off unwanted invaders.

Turkeys have a deep history that stretches back millions of years. The earliest turkeys evolved in North America over 20 million years ago. Fossil evidence shows that the Meleagridinae group has existed since the Early Miocene. Some extinct species include the Californian turkey (*Meleagris californica*). This bird likely went extinct due to human hunting and climate change.

Indigenous peoples in the Americas domesticated the wild turkey approximately 2,000 years ago. In Pre-Columbian Mexico, turkeys held great cultural and symbolic importance. Mayan aristocrats and priests even used ideograms of ocellated turkeys in their manuscripts.

Animal figures in the Maya codices (Plate 16) BHL41003948
Animal figures in the Maya codices (Plate 16) BHL41003948

The movement of turkeys across the globe changed how humans interact with them. Spanish chroniclers described turkeys being served in the markets of Tenochtitlán. Around 1519, turkeys were exported to Europe via Spain. They became very popular among the aristocratic classes. The birds arrived in England in 1541. Interestingly, the name "turkey" actually comes from a different bird. The name originally referred to the African guineafowl, which was imported to Europe via Turkey. Eventually, the name was transferred to the North American bird because they looked similar.

In the United States, turkey populations have faced extreme changes. In the 17th century, there were an estimated 10 million turkeys. By the 1930s, the population had crashed to only 30,000 birds. To fix this, biologists began trapping wild turkeys in the 1960s and 1970s. They re-introduced them to states like Minnesota and Vermont. Recent data shows the population is still shifting. As of 2019, the wild turkey population had declined by about 3% since 2014. During that same time, the number of wild turkey hunters dropped by 18%.

Wild turkeys are also very adaptable in their eating habits. Their diet changes based on the season to help them stay healthy. During the warm spring and summer, they eat grains like wheat and corn. They also hunt for protein from grasshoppers, spiders, worms, and lizards. In the cold fall and winter, they switch to eating smaller fruits and nuts.

Turkeyset
Turkeyset

This seasonal change ensures they find the nutrients they need. Because they are so adaptable, they sometimes live very close to humans. In Brookline, Massachusetts, the local turkey population is so large they are the town's unofficial mascot. While some people find them charming, others deal with aggressive behavior during mating season.

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🖼️ Images & Media (7)
File:Meleagris gallopavo MHNT.ZOO.2010.11.9.30.jpg
Meleagris gallopavo MHNT.ZOO.2010.11.9.30.jpg
File:Meleagris ocellata1.jpg
Meleagris ocellata1.jpg
File:1 Wild Turkey.jpg
1 Wild Turkey.jpg
File:Animal figures in the Maya codices (Plate 16) BHL41003948.jpg
Animal figures in the Maya codices (Plate...
File:Anatomy of turkey head.jpg
Anatomy of turkey head.jpg
Turkey - petting zoo - kanagawa 2023 June 25.ogv
File:Turkeyset.JPG
Turkeyset.JPG
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