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Gunnar,
The Cornell Lab of Ornithology has produced a nifty set of animated migration maps that cover a number of bird species. To see the map for Ruby-throated Hummingbird, go to https://science.ebird.org/en/status-and-trends/species/rthhum/abundance-map-weekly?regionCode=USA-MD&static=true&week=5. Once there, look in the sidebar on the right, under the header “Abundance.” Look down below the colored bar for Weekly Abundance and below the bar for Weeks of the Year. You’ll see a small right arrow in a blue box – that’s a video “play” button. (circld in red on attached screenshot). Click the play button to see the animated migration map – the colors indicate relative abundance. You’ll see birds flow into Maryland from the south in the spring and flow back out to the south in the fall. The bar in the Weeks of the Year will show the timing as the animation moves. Or you can click through one week at a time by changing the date in the box to the right of the video “play” arrow. In the screenshot, the date is showing as 1 Feb.
Enjoy!
Marcia
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Marcia Watson
Bowie, MD
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Looking at the abundance graphic site that Marcia posted, it seems that the Hummers should still be around, and (some of) mine are. The graphic seems to say that mine will leave here in about a week, and leave the Western Shore area (of Maryland) a bit later than here on the Eastern Shore.
So, Gunnar's mother's feeders would be predicted to still be getting Hummer business for a bit longer. Why the Hummers have vacated her area now might seem like a good question when looking at the statistics like that. But, I doubt that things are that predictable. Some Hummers leave early, some late, and only they know why they do what they do.
If her feeders have been up consistently for several years, the Hummers coming through from north of here may be remembering them and will stop there to get another sip before heading further south. So, she may be seeing a different population of Hummers, instead of the same individuals, at this time of year.
Steve Long
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On Sep 22, 2022, at 8:29 PM, Steve Long <steve...@atlanticbb.net> wrote:
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On Sep 22, 2022, at 10:21 PM, JAMES SPEICHER <jugor...@gmail.com> wrote:
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They are about due to be gone from the area. I still have some - two at least visiting today. All the adult males should be gone. One of my two remaining is a juve male. Today's frontal passage might move most of the remaining hummingbirds on South.
On Thu, Sep 22, 2022, 5:32 PM Gunnar Knapp <gunnar...@gmail.com > wrote:
- (snip)
- At least a week ago, my mother started complaining that the hummingbirds had all suddenly vanished from her feeders. She wants to know why they vanished. She says it seems too early for them to have left for the season.
- I know nothing about this, but am curious, and amazed at the level of expertise on this list serve. So I thought I'd ask: what might be reasons why all the hummingbirds have stopped coming to her feeders? When do they arrive and leave? How can I best learn more about hummingbird migration and about hummingbirds in general?
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Phil
Davis Davidsonville,
Maryland
pda...@ix.netcom.com
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