So these resident birds are in perfect condition, they are always ready to start breeding.

因此这些没有迁徙的鹳现在过着很好的生活，它们总是随时准备进行繁殖。

So maybe it's not as good at solving problems as a resident bird that doesn't have to invest so much in that long-term memory.

“也许乌鸦解决问题的能力不及留鸟，因为留鸟不必在长期记忆上投入如此之多。”

But Samplonius says if climate change increases the numbers of resident birds, the migrants could increasingly arrive at their breeding grounds, and find an eviction notice… , or worse, a literally head-splitting situation.

但 Samplonius 说， 如果气候变化增加留鸟的数量，候鸟可能会越来越多地到达它们的繁殖地， 并找到驱逐通知… … 或者更糟的是， 出现令人头晕目眩的情况。