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Which of these birds belong to the altricial species?

pheasants

swans

ducks

crows

Altricial species are those in which the young are incapable of moving around on their own soon after hatching or being born. The word is derived from the Latin root alere, meaning "to nurse, to rear, or to nourish" and indicates the need for young to be fed and taken care of for a long duration.

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peachberry98 wikipedia → Altricial

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Sweden

0%

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12%

87%

16

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20%

26%

46%

15

Germany

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24%

17%

42%

264

Poland

13%

22%

22%

40%

4317

Switzerland

24%

24%

8%

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25

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30%

12%

39%

136

the Philippines

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7%

7%

38%

13

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18%

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37%

27

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36%

33

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27%

36%

11

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29%

17

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38%

7%

23%

13

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25%

21%

82

Unknown

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10

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20%

10

Colombia

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36%

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11

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36%

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21%

9%

100

Italy

21%

42%

28%

7%

14

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