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The sociable weaver is a species of bird in the weaver family that uses pieces of vegetation to weave intricate nests. Within the species, there are four subspecies each of which inhabits a different region of southern Africa that includes parts of South Africa, Botswana, and Namibia. One thing these sparrow-like birds all have in common, which also sets them apart from other weavers, is that they work together to construct massive community nests.
In contrast to other birds, which typically build their nests during the breeding season, sociable weavers build, use, and maintain their nests throughout the year. The nests resemble large haystacks hanging in trees or on telephone poles. One nest can house anywhere from to 500 individual birds, with the largest nests reaching four meters in height. The nests have multiple entrance tunnels around seven centimeters wide, and within the structure, there are cozy nesting chambers for each family. The birds use hard twigs to form the roof, soft grasses for the nesting chambers, and sharp spikes of straw to protect the entrances. Sociable weaver families come and go over time; thus, the same nest may be continuously inhabited for up to 100 years.
Sociable weavers aren¡¦t taught to make these nests¡Xthey just instinctively know how to. The nests provide them with not only protection from predators and the elements but also a warm place to live in winter and a cool one in summer. When major weather changes or events occur, the nest allows them to adapt easily. From many points of view, sociable weavers¡¦ nests are truly impressive works of bird architecture.
1. What topic is NOT covered in the passage?
(A) Where sociable weavers live.
(B) What materials sociable weavers use.
(C) Why sociable weavers build huge nests.
(D) How sociable weavers weave vegetation.
2. According to the passage, what can be inferred about sociable weavers¡¦ nests?
(A) Each one has a king or queen bird.
(B) The tunnels lead to the nesting chambers.
(C) They are soft on the outside and hard on the inside.
(D) One nest usually only houses one generation of birds.
3. According to the passage, which of the pictures is most likely where sociable weavers live?
µª®×¡G1.D 2.B 3.C 4.B
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Words in Use
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individual [͵Èþndə£¿vÈþdʒÈýəl]
adj. Ó§Oªº¡AÓ¤Hªº
n. Ó¤H¡AÓÅé
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massive [£¿mæsÈþv]