The sociable weaver (*Philetairus socius*), a bird species native to Southern Africa, constructs the largest nests of any bird. These communal structures, which can house up to one hundred nesting pairs, are built primarily from twigs, dry grass, and straw. Researchers have observed that the inner chambers of these nests retain heat during cold desert nights, maintaining a temperature significantly higher than the ambient air outside. Furthermore, the birds populate the central chambers of the nest first because these areas provide the greatest insulation against the cold, whereas the outer chambers are occupied only when the inner chambers are fully populated.
According to the text, which statement is true about the nesting behavior of the sociable weaver?
- AThe nests are constructed primarily during the winter months to protect against cold desert nights.
- BThe birds inhabit the outer chambers of the nest during the day to avoid heat buildup.
- The birds populate the central chambers of the nest before occupying the outer chambers.Answer
- DThe birds use twigs, dry grass, and straw to construct nests specifically to attract potential mates.