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Hello All,
I have not followed this closely but the general idea of running =20
field sighting observations through some filter on the spot to establish=20
'first arrival' figures brings to mind "Sentence first; trial later" or=20
"Beware lest in grasping for the image you lose the substance."
Is it not preferable to simply accumulate field observations and let=
=20
analysis of the data in due time draw such conclusions as may appear to=20
be valid ? There are many subtle variations to migration. A species may=20
be present in NS year round but individuals of that species may shift=20
within the province or move out and be replaced by individuals from more=20
northerly or inland areas.
I suspect it is these subtle seasonal movements within the province=20
or region which enable presence year round in some cases. Why throw=20
subtle insights away because they don't fit a binary yes/no model ? And=20
for that matter what is the value of timely information about first=20
arrival ?
End of sermon.
Yt, Dave Webster, Kentville
------ Original Message ------
From: "Rick Whitman" <dendroica.caerulescens@gmail.com>
To: "naturens" <naturens@chebucto.ns.ca>
Sent: 3/21/2018 4:28:03 PM
Subject: [NatureNS] First Spring Arrivals
>It quickly becomes clear that the concept is complicated. Developing a=20
>TABLE presentation for this topic is nothing like the Birds of Winter=20
>List or the February List. For those it is Seen or Not Seen,=20
>province-wide, end of discussion.
>
>First Spring Arrivals in Table form, for the entire province, also has=20
>to be binary, does it not ? Or how many Tables with how many location=20
>boxes per species will be needed ?
>
>As proposed:
>Almost-Rigid-Migrants included, All Others not
>First Record included, All Later Records not.
>
>Aside from the above concept, you very quickly go to a set of tables=20
>for each County (?) or a written Discussion much like we already have=20
>(had) in NS Birds. No ?
>
>I believe the actual question is whether the birding community feels a=20
>single table approach for Almost-Rigid-Migrants, First Record only,=20
>province-wide, adds to our total knowledge in a useful way.
>
>When I saw the first notice from Alix, I thought it was very exciting=20
>and was surprised that a few individuals had taken it on. If the core=20
>objective is to monitor the impact of climate change, you probably do=20
>need province-wide dates to reduce random variation at the (say) =20
>County level.
>
>Regards,
>Rick Whitman
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div>Hello All,</div><div>=C2=A0 =C2=A0 I have not followed this closely but =
the general idea of running =C2=A0field sighting observations through some =
filter on the spot to establish 'first arrival' figures brings to mind "Se=
ntence first; trial later" or "Beware lest in grasping for the image you lo=
se the substance."</div>
<div>=C2=A0 =C2=A0 Is it not preferable to simply accumulate field observat=
ions and let analysis of the data in due time draw such conclusions as may=
appear to be valid ? There are many subtle variations to migration. =C2=A0A =
species may be present in NS year round but individuals of that species ma=
y shift within the province or move out and be replaced by individuals from =
more northerly or inland areas.=C2=A0</div><div>=C2=A0 =C2=A0 I suspect it =
is these subtle seasonal movements within the province or region which ena=
ble presence year round in some cases. Why throw subtle insights away becau=
se they don't fit a binary yes/no model ? And for that matter what is the v=
alue of timely information about first arrival ?</div><div>=C2=A0 =C2=A0 En=
d of sermon.</div><div>Yt, Dave Webster, Kentville</div><div><br /></div>
<div>------ Original Message ------</div>
<div>From: "Rick Whitman" <<a href=3D"mailto:dendroica.caerulescens@gmai=
l.com">dendroica.caerulescens@gmail.com</a>></div>
<div>To: "naturens" <<a href=3D"mailto:naturens@chebucto.ns.ca">naturens=
@chebucto.ns.ca</a>></div>
<div>Sent: 3/21/2018 4:28:03 PM</div>
<div>Subject: [NatureNS] First Spring Arrivals</div><div><br /></div>
<div id=3D"x2262e697b978441"><blockquote cite=3D"CAA9nSY-O8t8QoCfqFXTD119z=
=3D+tp+yF5NGD-Jr46vJu4X2Vh3Q@mail.gmail.com" type=3D"cite" class=3D"cite2">
<div dir=3D"ltr">It quickly becomes clear that the concept is complicated.=
Developing a TABLE presentation for this topic is nothing like the Birds of =
Winter List or the February List. For those it is Seen or Not Seen, provin=
ce-wide, end of discussion.<div><br /></div><div>First Spring Arrivals in T=
able form, for the entire province, also has to be binary, does it not ? Or =
how many Tables with how many location boxes per species will be needed ?=
=C2=A0</div><div><br /></div><div>As proposed:</div><div>Almost-Rigid-Migra=
nts included, All Others not</div><div>First Record included, All Later Rec=
ords not.</div><div><br /></div><div>Aside from the above concept, you very =
quickly go to a set of tables for each County (?) or a written Discussion=
much like we already have (had) in NS Birds. No ?</div><div><br /></div><di=
v>I believe the actual question is whether the birding community feels a si=
ngle table approach for Almost-Rigid-Migrants, First Record only, province-=
wide, adds to our total knowledge in a useful way.</div><div><br /></div