Date: 5/4/25 9:59 pm From: Pete Sole <pete...> Subject: Re: [MBBIRDS] This year's migration numbers/lateness
Hi Carol,
I'm no expert. I don't know how far back the "historic" data goes. But
my suspicion, is that data older than perhaps 10 or 20 years, reflects
migration patterns that may no longer be present. That is why when I
look at data on ebird to try to tease out trends, I try to limit the
data to the last 10 years. If nothing else, we know that land use and
climate patterns have changed significantly in the last 50 years. Not to
mention the estimates, that we have lost some 2.9 billion birds in North
America since 1970. (source:
https://www.birds.cornell.edu/home/bring-birds-back)
Regardless, here are 7 suggestions to help avian species:
On 5/4/25 8:57 PM, Carol Pecot wrote:
> I was looking at the BirdCast dashboard ( https://dashboard.birdcast.info/region/US-CA-087) and saw that the graph of the “Total Birds Crossed” seems to show about 1/2 the number of birds compared to the historic amount for our county. Does that seem correct, or might that be a late migration that people have been mentioning? If late is the case, then maybe it will continue rising more steeply…?
>
> Does anyone have other information on this?
>
> Carol Pecot (We now have M & F BH Grosbeaks, and got a Wilson’s Warbler about a week ago)
>
