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My old buddy Cam Finlay in Victoria is an expert on hummingbirds (and
has captured and banded them for decades), and here is his response
to Chris's reply to Andy's question. Jim in Wolfville.
Begin forwarded message:
> From: Joy and Cam Finlay <joyandcamfinlay@shaw.ca>
> Date: September 10, 2012 1:51:31 PM ADT
> To: "James W. Wolford" <jimwolford@eastlink.ca>
> Subject: Re: Intriguing hummers question?
>
> Jim he is more or less right, males usually come first. when the
> first wave of hummers arrive here, there are usually a few females
> which presumably gives them a head start. Here on the breeding
> grounds of Rufous, Back-chins and Calliope females arrive within a
> week or less of territorial males. When breeding is over males
> usually leave 2 to 3 months later with females staying around
> another month or two, probably to raise a 2nd brood for early
> nesters! We have recently found that early rufous nesters , the
> odd time, do produce 2 broods and the local Anna's may produced up
> to 3 broods since they start nesting in Jan. out here
> Cam
>
> From: James W. Wolford
> Sent: Monday, September 10, 2012 8:58 AM
> To: Joy and Cam Finlay
> Subject: Intriguing hummers question?
>
>
>
> Begin forwarded message:
>
>> From: Christopher Majka <c.majka@ns.sympatico.ca>
>> Date: September 10, 2012 11:41:07 AM ADT
>> To: naturens@chebucto.ns.ca
>> Subject: Re: [NatureNS] Intriguing question?
>> Reply-To: naturens@chebucto.ns.ca
>>
>> Hi Andy,
>>
>> As I understand it, at least in terms of spring migration, the
>> thought is that males of some species (including Ruby-throated,
>> Rufous, Allens, and Calliope hummingbirds) migrate first to stake
>> out territories. Females follow some 2-3 weeks later to be able to
>> take advantage of a nutritionally richer supply of flowers along
>> the migration route. On the southward migration, juveniles tend to
>> follow females.
>>
>> I know there has been a lot of investigation on survivorship of
>> hummingbirds related to the timing of migration, what plants are
>> in bloom over what portion of the migration route, and the ability
>> to stake out territories in optimal/suboptimal habitat. The
>> situation with respect to hummingbirds is also somewhat different
>> from many other birds since male hummingbirds are polygamous and
>> because of the nutritional requirements and physiology of
>> hummingbirds.
>>
>> I don't have the time to investigate further but perhaps someone
>> on the list will know more.
>>
>> Cheers!
>>
>> Chris
>>
>> On 10-Sep-12, at 10:12 AM, andy dean wrote:
>>
>>> Our son-in-law is a budding birder and asked us an interesting
>>> question
>>> which we couldn't answer.
>>> Why do male hummingbirds migrate ahead of the females? Anybody
>>> know the
>>> answer?
>>>
>>> Andy and Lelia Dean
>>> 86 Baden Powell Drive
>>> Kentville, N.S.
>>> (902) 678-6243
>>>
>>>
>>>
>>>
>>>
>>
>
>
--Apple-Mail-23--377357659
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">
My old buddy Cam Finlay in Victoria is an expert on hummingbirds (and =
has captured and banded them for decades), and here is his response to =
Chris's reply to Andy's question. Jim in =
Wolfville.<br><div><br><div>Begin forwarded message:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"3" color=3D"#000000" =
style=3D"font: 12.0px Helvetica; color: #000000"><b>From: =
</b></font><font face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px =
Helvetica">Joy and Cam Finlay <<a =
href=3D"mailto:joyandcamfinlay@shaw.ca">joyandcamfinlay@shaw.ca</a>></f=
ont></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Helvetica" =
size=3D"3" color=3D"#000000" style=3D"font: 12.0px Helvetica; color: =
#000000"><b>Date: </b></font><font face=3D"Helvetica" size=3D"3" =
style=3D"font: 12.0px Helvetica">September 10, 2012 1:51:31 PM =
ADT</font></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Helvetica" =
size=3D"3" color=3D"#000000" style=3D"font: 12.0px Helvetica; color: =
#000000"><b>To: </b></font><font face=3D"Helvetica" size=3D"3" =
style=3D"font: 12.0px Helvetica">"James W. Wolford" <<a =
href=3D"mailto:jimwolford@eastlink.ca">jimwolford@eastlink.ca</a>></fon=
t></div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px; "><font face=3D"Helvetica" size=3D"3" =
color=3D"#000000" style=3D"font: 12.0px Helvetica; color: =
#000000"><b>Subject: </b></font><font face=3D"Helvetica" size=3D"3" =
style=3D"font: 12.0px Helvetica"><b>Re: Intriguing hummers =
question?</b></font></div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; =
"><br></div> <div dir=3D"ltr"> <div style=3D"FONT-FAMILY: 'Calibri'; =
COLOR: #000000; FONT-SIZE: 12pt"> <div>Jim he is more or less right, =
males usually come first. when the first wave of hummers arrive =
here, there are usually a few females which presumably gives them a head =
start. Here on the breeding grounds of Rufous, Back-chins and =
Calliope females arrive within a week or less of territorial =
males. When breeding is over males usually leave 2 to 3 =
months later with females staying around another month or two, probably =
to raise a 2nd brood for early nesters! We have recently found =
that early rufous nesters , the odd time, do produce 2 broods and the =
local Anna's may produced up to 3 broods since they start nesting in =
Jan. out here</div> <div>Cam</div> <div style=3D"FONT-STYLE: normal; =
DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: =
small; FONT-WEIGHT: normal; TEXT-DECORATION: none"> <div style=3D"FONT: =
10pt tahoma"> <div> </div> <div style=3D"BACKGROUND: #f5f5f5"> <div =
style=3D"font-color: black"><b>From:</b> <a =
title=3D"jimwolford@eastlink.ca" =
href=3D"mailto:jimwolford@eastlink.ca">James W. Wolford</a> </div> =
<div><b>Sent:</b> Monday, September 10, 2012 8:58 AM</div> =
<div><b>To:</b> <a title=3D"joyandcamfinlay@shaw.ca" =
href=3D"mailto:joyandcamfinlay@shaw.ca">Joy and Cam Finlay</a> </div> =
<div><b>Subject:</b> Intriguing hummers question?</div></div></div> =
<div> </div></div> <div style=3D"FONT-STYLE: normal; DISPLAY: =
inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; =
FONT-WEIGHT: normal; TEXT-DECORATION: none"> <div> </div> <div> =
<div> </div> <div>Begin forwarded message:</div><br =
class=3D"Apple-interchange-newline"> <blockquote type=3D"cite"> <div =
style=3D"MARGIN: 0px"><font style=3D"FONT: 12px helvetica; COLOR: =
#000000" color=3D"#000000" size=3D"3" face=3D"Helvetica"><b>From: =
</b></font><font style=3D"FONT: 12px helvetica" size=3D"3" =
face=3D"Helvetica">Christopher Majka <<a =
href=3D"mailto:c.majka@ns.sympatico.ca">c.majka@ns.sympatico.ca</a>></f=
ont></div> <div style=3D"MARGIN: 0px"><font style=3D"FONT: 12px =
helvetica; COLOR: #000000" color=3D"#000000" size=3D"3" =
face=3D"Helvetica"><b>Date: </b></font><font style=3D"FONT: 12px =
helvetica" size=3D"3" face=3D"Helvetica">September 10, 2012 11:41:07 =
AM ADT</font></div> <div style=3D"MARGIN: 0px"><font style=3D"FONT: =
12px helvetica; COLOR: #000000" color=3D"#000000" size=3D"3" =
face=3D"Helvetica"><b>To: </b></font><font style=3D"FONT: 12px =
helvetica" size=3D"3" face=3D"Helvetica"><a =
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</a></font>=
</div> <div style=3D"MARGIN: 0px"><font style=3D"FONT: 12px helvetica; =
COLOR: #000000" color=3D"#000000" size=3D"3" =
face=3D"Helvetica"><b>Subject: </b></font><font style=3D"FONT: 12px =
helvetica" size=3D"3" face=3D"Helvetica"><b>Re: [NatureNS] Intriguing =
question?</b></font></div> <div style=3D"MARGIN: 0px"><font =
style=3D"FONT: 12px helvetica; COLOR: #000000" color=3D"#000000" =
size=3D"3" face=3D"Helvetica"><b>Reply-To: </b></font><font style=3D"FONT:=
12px helvetica" size=3D"3" face=3D"Helvetica"><a =
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</a></font>=
</div> <div style=3D"MARGIN: 0px; MIN-HEIGHT: 14px"> </div> <div =
style=3D"MARGIN: 0px">Hi Andy,</div> <div style=3D"MARGIN: 0px; =
MIN-HEIGHT: 14px"> </div> <div style=3D"MARGIN: 0px">As I =
understand it, at least in terms of spring migration, the thought is =
that males of some species (including Ruby-throated, Rufous, Allens, =
and Calliope hummingbirds) migrate first to stake out territories. =
Females follow some 2-3 weeks later to be able to take advantage of a =
nutritionally richer supply of flowers along the migration route. On the =
southward migration, juveniles tend to follow females.</div> <div =
style=3D"MARGIN: 0px; MIN-HEIGHT: 14px"> </div> <div =
style=3D"MARGIN: 0px">I know there has been a lot of investigation on =
survivorship of hummingbirds related to the timing of migration, what =
plants are in bloom over what portion of the migration route, and the =
ability to stake out territories in optimal/suboptimal habitat. The =
situation with respect to hummingbirds is also somewhat different from =
many other birds since male hummingbirds are polygamous and because of =
the nutritional requirements and physiology of hummingbirds.</div> =
<div style=3D"MARGIN: 0px; MIN-HEIGHT: 14px"> </div> <div =
style=3D"MARGIN: 0px">I don't have the time to investigate further but =
perhaps someone on the list will know more.</div> <div style=3D"MARGIN: =
0px; MIN-HEIGHT: 14px"> </div> <div style=3D"MARGIN: =
0px">Cheers!</div> <div style=3D"MARGIN: 0px; MIN-HEIGHT: =
14px"> </div> <div style=3D"MARGIN: 0px">Chris</div> <div =
style=3D"MARGIN: 0px; MIN-HEIGHT: 14px"> </div> <div =
style=3D"MARGIN: 0px">On 10-Sep-12, at 10:12 AM, andy dean wrote:</div> =
<div style=3D"MARGIN: 0px; MIN-HEIGHT: 14px"> </div> <blockquote =
type=3D"cite"> <div style=3D"MARGIN: 0px">Our son-in-law is a budding =
birder and asked us an interesting question</div> <div =
style=3D"MARGIN: 0px">which we couldn't answer.</div> <div =
style=3D"MARGIN: 0px">Why do male hummingbirds migrate ahead of the =
females?<span class=3D"Apple-converted-space"> </span>Anybody know =
the</div> <div style=3D"MARGIN: 0px">answer?</div> <div =
style=3D"MARGIN: 0px; MIN-HEIGHT: 14px"> </div> <div =
style=3D"MARGIN: 0px">Andy and Lelia Dean</div> <div style=3D"MARGIN: =
0px">86 Baden Powell Drive</div> <div style=3D"MARGIN: =
0px">Kentville, N.S.</div> <div style=3D"MARGIN: 0px">(902) =
678-6243</div> <div style=3D"MARGIN: 0px; MIN-HEIGHT: =
14px"> </div> <div style=3D"MARGIN: 0px; MIN-HEIGHT: =
14px"> </div> <div style=3D"MARGIN: 0px; MIN-HEIGHT: =
14px"> </div> <div style=3D"MARGIN: 0px; MIN-HEIGHT: =
14px"> </div> <div style=3D"MARGIN: 0px; MIN-HEIGHT: =
14px"> </div></blockquote> <div style=3D"MARGIN: 0px; MIN-HEIGHT: =
14px"> </div></blockquote></div> =
<div> </div></div></div></div></blockquote></div><br></body></html>=
--Apple-Mail-23--377357659--
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