maybe the gulls are travelling/staying further north ?

there was a bit on the news about southern varieties of butterflies showing up in record numbers in the northeast, like seeing a hundred or so of X, where in past times, you'd be lucky to see one or two X - essentially due to warmer climate apparantly - could be gulls and maybe eagles (I seem to have seen fewer eagles the past couple of years than normal) are travelling further north to escape the heat