Hi all,
Just a few comments to catch up on all of these threads. And a big
welcome back to all of those checking this list regularly!
On Wed, Mar 17, 2010 at 7:57 PM, Andrew Albright
wrote:
> Is this too early for a big NF in the mid-atlantic region?
Broadly, no, I don't think so - this week
Hi all,
Good discussion. I'll chime in further later on about the winds and
migration - much to say about that. . .but on a more proximal note, an
interesting assortment of calls from vocal migrants moving tonight in
NYC including Hermit Thrush (4), Brown Creeper (2), Red-breasted
Nuthatch (2),
Winds are indeed interesting. Several questions arise:
Do birds use surface winds to "decide" whether to go or not, or do they use
a combination of surface variables such as barometric pressure, rH, etc.,
and/or how much do they "test the atmosphere" (we do know that this occurs,
where birds will
The question that I like to ask of all this is which level of winds matters
the most when talking about migration? I am seeing that others are taking into
account the surface wind direction (NWS observations and forecasts), but what
about above that? The winds change direction dramatically
Andrew- I'm running a multiple regression right now on weather data related
to migration intensity and several of the variables you mentioned are
included. Something I'm meaning to do is to include time-since-last
migration event but have yet to create the variable. I'll let the list know
when
...I really have to retrain myself to check this list now that migration is
back in action!
Yeah, birds are moving over the mid-Atlantic tonight. There appears to be a
nice flight over the Delmarva Peninsula and into New Jersey, with less
movement over coastal NC and heavy movement out of
Andrew,
I think certain early migrating species might take advantage of
tonight's weather conditions. There has not been a night like this
around my house in many weeks. Although NWS here in Washington DC region
only has wind out of a southerly component for 3 hrs before switching
back to
Is this too early for a big NF in the mid-atlantic region?
Are these the main factors?
1) Date during migration season (higher numbers during peak)
2) What has happened during previous nights - i.e. if the wind was
blowing strongly in the wrong direction or
3) Wind speed and direction
It should
