A study released by the University of Illinois revealed a unique symbiosis relationship between the blackbird and the songbird, or the so-called "yellow fringe", with the aim of warning it against the brown-headed cow that is known to parasitize the nests of other birds.
The results of the study were published in the journal Communications Biology on March 31.
Private messages
In the new study, the researchers reported that blackbird blackbirds with red wings respond to a special message issued by the yellow vitiligo, "Attention ... the cow in our surroundings."
The researchers noted that the release of the yellow glazed birds to tweet with the voice of "seet" pushes the black blackbirds with red wings to quickly return to their nests to sit tightly on their eggs, in anticipation that the female cow will lay an egg in the nest.
And the cow is known as one of the most dangerous birds in the parasitism of the nests of other birds, especially small bird species such as blackbirds, for example.
The results of the study were published in the journal Communications Biology on March 31.
Private messages
In the new study, the researchers reported that blackbird blackbirds with red wings respond to a special message issued by the yellow vitiligo, "Attention ... the cow in our surroundings."
The researchers noted that the release of the yellow glazed birds to tweet with the voice of "seet" pushes the black blackbirds with red wings to quickly return to their nests to sit tightly on their eggs, in anticipation that the female cow will lay an egg in the nest.
And the cow is known as one of the most dangerous birds in the parasitism of the nests of other birds, especially small bird species such as blackbirds, for example.
In most cases, the egg of a cow bird is larger than the eggs of other varieties, but most of these types of host birds do not recognize the foreign egg, and take care of it with the rest of the eggs
However, the egg of a cow bird hatches faster than the eggs of the host nest, and its young grow faster than the rest of the young in the nest, which means its dominance at the expense of the host variety
This eventually leads to the death of young host birds by starvation or suffocation at the bottom of the nest, or the small bird of the cow pushed them from the nest. Consequently, it represents a real threat The researchers also found that the response of the blackbird to a tweet “Chip,” for example, differs from others, as if it symbolized the alert from predators. Upon hearing it, blackbirds rushed to find the possible threat
The study also showed that black birds with red wings close to songbirds respond more strongly than nested away
The results of this study are identical to the previous studies, which revealed that black birds with red wings nesting near yellow songbirds suffer less from laying eggs in their nests
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