During courtship and aggressive displays, the turkey enlarges its colored neck collar by inflating sacs in the neck region and then flings about a pendulous part of the colored signaling apparatus as it utters calls designed to attract or repel.
这句话结尾的as,不应该被理解为连词“当...的时候”吧?我觉得它像时间标志词,表示同时。我理解的对吗?