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The northern grey wren, the squid and the grey-striped wren, are three species of birds, which belong to the genus Grebe of the family Finches. The Northern Grey Wagtail (English name: Asian Brown Flycatcher), the English name literally translates to the Asian Brown Grebe. Grey-streaked Flycatcher is also known as Grey-spotted Grebe or Spotted Grebe.
Grey-striped grebe
Identifying these three kinds of birds is difficult.
Northern Grey Wren
Their plumage is similar in color, about the same size, and all three are generally very small, with a body length of only about 13 centimeters.
It breeds in northeastern Asia and the Himalayas and migrates to southeast asia to overwinter in winter. The Northern Grey Wren breeds in northeastern Asia, the Himalayas and parts of southeastern Asia, and migrates south to southern and southeastern Asia in winter to overwinter. Grey-striped grebe breeds in northeastern Asia and migrates south to Southeast Asia to overwinter.
In North China, East China and other regions, their distribution areas overlap. This makes it harder to identify. How exactly should it be recognized?
Squid
Some illustrations say that looking at the eye circles to identify, the white circles of the black wren and the northern gray wren are obvious, while the gray-striped oar eye circles are also white, but not obvious.
It is also said that looking at the throat color, the throat of the blackbird is white, with a white half-neck ring.
In addition, the color of the forehead is also depended on, and the frontal part of the gray-striped bird has a narrow white horizontal band.
But for beginners, when observing in the field, the angle and light are not so ideal, these parts are not easy to see, and the distinction is more troublesome. What to do?
First, with the help of sound.
The cry of the black wren, crisp and slightly gentle. The Northern Grey Wren and the Grey Streaked Wren are continuous monotonous sounds.
If you can see them, first of all, pay attention to the color of their chest and ribs. Especially when people observe birds in tall trees, it is easy to see these locations.
The thorax and flanks of the Northern Grey Wren are greyish-white and have no longitudinal stripes.
The chest and both sides of the squid and the grey-striped grebe have longitudinal stripes, and the thorax and flank of the squirrel are darker, and the longitudinal spots are thick and blurry, appearing dirty.
The grey-striped thrush has dark grey longitudinal stripes , with more distinct stripes and thicker longitudinal stripes on both sides than on the chest.
The wings of the squid have inconspicuous yellow markings, and the gray-striped grebe has narrow white spots on its wings.
If they stop at a tree to rest, this is a good opportunity to identify.
When the squid is stopping, the wingtips are short, about one-half to two-thirds of the tail feathers.
The grey-striped grebe has a long wing tip, exceeding two-thirds of its tail feathers and even reaching the end of the tail.
The northern greybird has shorter wingtips, about half the tail feathers.
It is worth noting that in the autumn, the first wintering of the blackbird has different coat colors, some have coarse longitudinal stripes, and some have all the chest and flanks are smoky gray.
In addition, to look at the mouth, of these three species, the mouth of the Northern Grey Wren is wide and long, and the yellow base of the lower mouth is more pronounced than the other two.
To summarize:
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First distinguish between the sturgeon and the other two by sound, and then make a feather color comparison.
Northern Grey Wren:
1. The eyes are white first, obvious;
2. The mouth appears the largest in the three kinds of plover, and the yellow color at the base of the lower mouth is more obvious than that of the other two;
3. No longitudinal stripes and dark patches on the chest and two sides;
4. The primary flight feathers are the shortest.
Squid:
1. The eyes are gray-brown at first, not obviously light;
2. The mouth is smaller than that of the Northern Grey Grebe, and the yellow color at the base of the lower mouth is not obvious;
3. The wrinkles are not obvious;
4, there is a clear white half collar ring;
5. There are longitudinal spots on the chest and two flanks, which are thick and blurry;
6. The primary flight feathers are longer;
7. The undertail coverts have dark markings.
Grey-striped Grebe:
1, the eye is not light color;
3. The beard pattern is more obvious than that of the black wren, and there is no white collar ring;
4. There are dark gray longitudinal stripes on the chest and two flanks, and the longitudinal stripes on the two flanks are thicker than those on the chest.
5. The undertail coverts are white and spotless.
References: Hand-drawn Catalogue of Wild Birds in Taiwan, Birds of Hong Kong and South China
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