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White-eye

life science Maturity 11-13 Next article →

White-eyes are a diverse family of small passerine birds known as Zosteropidae. These birds are found across many warm regions of the world. They inhabit tropical, subtropical, and temperate areas of Sub-Saharan Africa. You can also find them in southern and eastern Asia. Many species live in the tropical areas of Australasia.

Zosterops palpebrosus1
Zosterops palpebrosus1

White-eyes are very common on tropical islands. They live in the Indian Ocean and the western Pacific Ocean. Some populations are also found in the Gulf of Guinea. Most species are endemic to single islands or specific archipelagos. This means they are found in only one specific place on Earth.

Most white-eyes have a very similar appearance, which is often called undistinguished. Their plumage is usually a greenish olive color on the top. Their undersides are typically a pale grey. Some species show different colors, like a white or bright yellow throat. Others might have buff-colored flanks on their sides. The most recognizable feature is a ring of tiny white feathers around the eyes. This feature is so important that their scientific name comes from the Ancient Greek word for "girdle-eye."

Zosterops palpebrosus1
Zosterops palpebrosus1

They also possess rounded wings and strong legs for movement.

To eat, white-eyes use specialized physical tools. Many species are nectarivorous, which means they eat nectar from flowers. To do this, they have slender, pointed bills. They also have tongues with brush-tipped ends to help collect liquid. While they love nectar, they are also mainly insectivorous. This means their diet consists largely of insects. They also consume various kinds of fruits.

Zosterops palpebrosus1
Zosterops palpebrosus1

These birds are highly sociable animals. They live in large flocks for most of the year. These groups only separate when the breeding season begins. They build their nests in trees and lay two to four pale blue eggs.

The history of classifying white-eyes has changed as science improved. In 1853, a French naturalist named Charles Lucien Bonaparte introduced the group. He originally classified them as a subfamily called Zosteropinae. For a long time, they were considered a distinct family because they look so similar to one another. This similarity is due to little adaptive radiation, which is when species change to fit different environments. In 1995, the genus Apalopteron was moved into the white-eye family. This change happened because of new evidence regarding their genetics and behavior.

Modern scientists use DNA to understand how these birds are related. In 2003, Alice Cibois published a study using mtDNA cytochrome b and 12S/16S rRNA sequence data. Her research suggested that white-eyes might form a clade with yuhinas. A clade is a group of organisms that includes a common ancestor. Previously, yuhinas were placed in a large group called the Old World babblers. This group was often called a "wastebin" family because it contained many different types of birds. Current opinions suggest merging white-eyes into the Timaliidae family as a subfamily.

The white-eye family is quite large, containing 149 different species. These species are organized into 13 different genera. The largest genus is Zosterops, which includes 110 species. Other genera include Heleia, which has 10 species, and Staphida, which has three.

Yuhina diademata - 20060115
Yuhina diademata - 20060115

Some species have even moved between groups as we learn more. For example, the genus Apalopteron was once placed in the Meliphagidae family. The silvereye, or Zosterops lateralis, is a notable example of a colonizing species. It naturally moved to New Zealand in 1855. In New Zealand, people call it the "wax-eye" or the tauhou, which means "stranger."

While white-eyes are beautiful to watch, they can sometimes impact agriculture. In Australian vineyards, the silvereye can become a problem. The birds may pierce the skins of grapes to feed. This action can allow infections or insect damage to follow. Despite this, white-eyes remain a vital part of many island ecosystems. Their ability to spread across oceans and adapt to different islands makes them a fascinating subject for biologists. Scientists continue to study their relationships to better understand the history of bird evolution.

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🖼️ Images & Media (2)
File:Zosterops palpebrosus1.jpg
Zosterops palpebrosus1.jpg
File:Yuhina diademata - 20060115.jpg
Yuhina diademata - 20060115.jpg
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