Passage
Biologists observing Australian bushfires have long noted that raptors, such as the black kite (*Milvus migrans*) and brown falcon (*Falco berigora*), congregate at fire fronts to capture escaping prey. However, a study by Bonta et al. proposes a far more active role: these birds act as 'pyrophiles' that intentionally propagate fire by carrying burning twigs in their talons to unburned areas. Skeptics argue that this behavior is accidental, suggesting that birds merely drop embers while retrieving prey. To evaluate these competing interpretations, researchers analyzed three key behavioral patterns: first, multiple birds systematically carrying embers to the same unburned patch; second, the selection of smoldering hardwood twigs over lighter, fast-burning grass; and third, the directional movement of birds against prevailing winds to start new fire lines, maximizing prey exposure. These observations suggest a deliberate ecological strategy rather than sporadic, accidental occurrences. By starting new fires, the raptors force prey out of previously safe havens, suggesting that the behavior is a coordinated hunting tactic.
Question
Based on the passage, match each of the researchers' claims about raptor behavior on the left with the specific evidence that supports it on the right.
- The fire-spreading behavior is a coordinated collective effort rather than an isolated action.Observations of multiple raptors systematically carrying embers to the same unburned area.
- The birds demonstrate an understanding of which materials are effective for transporting fire.The preference shown by the birds for smoldering hardwood twigs over light grass.
- The fire-spreading behavior is strategically oriented to maximize prey capture.The directional movement of the birds against prevailing winds to start new fire lines.