第二篇
你问到第六题C答案是否有异议。。文中有提到caged starlings，句中“Early in his research, Kramer found that caged migratory birds became very restless at about the time they would normally have begun migration in the wild” caged migratory birds指代的就是caged starling
第三篇
Q1:你问的“more evidence that predator pressure favors the evolution of begging calls that are hard to detect and pinpoint”
我和你的想法一致。是指的tree-nesters通过进化柔化其叫声来降低侵略者袭击
Q2: "Given that predators can make it costly to beg for food, what benefit do begging nestlings derive from their communications? " 我的翻译是：这会是高代价的对食物的哀求而引来掠食者，那什么好处可以从乞求的雏鸟交流中得到呢？