Cold temperatures and incubation.

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SMJohnson
Posts: 146
Joined: Wed Feb 19, 2014 11:06 am
Location: IA/Ottumwa

What kind of cold temperatures can eggs being incubated take and remain viable?
Just had an overnight low of 40° with a wind chill of 31°. Believe there are over
150 eggs with perhaps 75% being incubated.
2012-13 pair..........2017- -93 pair
2013-52 pair..........2018- -87 pair
2014-65 pair..........2019-102 pair
2015-85 pair..........2020-109 pair
2016-80 pair..........2021-???

2021 Offering 180 Nesting Cavities
64 Troyer Horizontal Gourds
64 Troyer Vertical Gourds
2 T14'S - 28 Compartments
3 SMJ8'S - 24 Compartments
avesrun
Posts: 1123
Joined: Tue Apr 30, 2013 1:10 pm
Location: Iowa/West Des Moines
Martin Colony History: Home Site: 2017- 0
2016 - 1st pair, fledged 5
Satellite Site: 2017 (3rd season)
34 pair
Fledged- 102

Good question SMJ but one I can't answer. Will you be offering crickets or meal worms over the next couple days with highs in the 50's?

Watched an sy bed down for the 4th night in a row last night at the quarry. Didn't see a second bird; however one may have already been in gourd as I only got there with about an hour left of daylight. I did observe 2 sy during the midday though briefly.
TimG
PMCA Member
Home Site: 2012-15 visitors
2016 - 1st pair, fledged 5
2017-18 Zero
2019- 3 Successful Pr
2020- 21pr, fledged 76
Satellite Site: 2014 - visitors
2015 - 2 pair fledged 9
2016 - 13 pair fledged 44
2017 - 31 pair fledged 118
2018 - 44 pair 163 fledged
2019- 49 pr 219 fledged
2020- 47 pr 209 fledged
Louise Chambers
Site Admin
Posts: 6211
Joined: Tue Nov 04, 2003 1:07 pm
Location: Corpus Christi, TX

Adult martins have temp of about 105 degrees. Eggs that are on a good nest, and being incubated by female's brood patch, should be okay. Daytime temps, if cool, will mean that females have to spend more time on eggs and less time to feed. Daytime temps may be more important that nighttime temps. I hope yours are all toasty warm.
SMJohnson
Posts: 146
Joined: Wed Feb 19, 2014 11:06 am
Location: IA/Ottumwa

Louise thanks for the response. I placed what I thought was an abundance of
White Pine needles in all of the compartments. Remembering how much the
material packed down last year. Today's high is forecasted to be 61 with
partly cloudy skies and wind at 10 to 20 miles per hour.
2012-13 pair..........2017- -93 pair
2013-52 pair..........2018- -87 pair
2014-65 pair..........2019-102 pair
2015-85 pair..........2020-109 pair
2016-80 pair..........2021-???

2021 Offering 180 Nesting Cavities
64 Troyer Horizontal Gourds
64 Troyer Vertical Gourds
2 T14'S - 28 Compartments
3 SMJ8'S - 24 Compartments
lynnh
Posts: 391
Joined: Thu Jun 28, 2007 7:07 am
Location: Iowa, New Sharon

Hey Steve,I think they will be ok as long as their food source is not depleted for to long.Our colony has seen these temps before during incubation and were just fine,however our birds rely on us for supplemental feeding during these times. The first ones are due to hatch on friday or saturday.
2007 2 pair 8 fledged
2008 4 pair 18 fledged
2009 21 pair 87 fledged
2010 44 pair 174 fledged
2011 68 pair 244 fledged
2012 82 pair 364 fledged
2013 82 pair 359 fledged
2014 86 pair 415 fledged
2015 101 pair 427 fledged
Bob Buskas
Posts: 600
Joined: Sat Nov 15, 2003 8:08 pm
Location: Wetaskiwin Alberta, Canada

I agree with Louise, so long as the female can feed in the afternoon the eggs will be fine, if the female has a good Hubbie, he will sit on the eggs while she feeds and keep them from cooling. Good mature parents will have no problem with the cold temps. But not all parents work together.
Bob Buskas, Alberta, Canada (The Northern Sky's Colony) Supplimental feeding is the key during bad weather, but you must train them to feed ahead of time.
SMJohnson
Posts: 146
Joined: Wed Feb 19, 2014 11:06 am
Location: IA/Ottumwa

Don't believe males do any incubating. Anyone know for sure?
2012-13 pair..........2017- -93 pair
2013-52 pair..........2018- -87 pair
2014-65 pair..........2019-102 pair
2015-85 pair..........2020-109 pair
2016-80 pair..........2021-???

2021 Offering 180 Nesting Cavities
64 Troyer Horizontal Gourds
64 Troyer Vertical Gourds
2 T14'S - 28 Compartments
3 SMJ8'S - 24 Compartments
Bob Buskas
Posts: 600
Joined: Sat Nov 15, 2003 8:08 pm
Location: Wetaskiwin Alberta, Canada

Your correct the males do not incubate but many will keep the eggs from cooling by sitting on them while the female is feeding. My nest cam has showed this many times during cold weather.
Bob Buskas, Alberta, Canada (The Northern Sky's Colony) Supplimental feeding is the key during bad weather, but you must train them to feed ahead of time.
SMJohnson
Posts: 146
Joined: Wed Feb 19, 2014 11:06 am
Location: IA/Ottumwa

So thrilled to learn yesterday that my colony is now taking supplemental food
from two different feeding trays. Had them taking egg shells last year. Put
crickets out earlier this year and they were gone, but wasn't sure the Martins
had gotten them. Put about 130 crickets and 6 scrambled eggs and they ate
all of the crickets and part of the eggs.
2012-13 pair..........2017- -93 pair
2013-52 pair..........2018- -87 pair
2014-65 pair..........2019-102 pair
2015-85 pair..........2020-109 pair
2016-80 pair..........2021-???

2021 Offering 180 Nesting Cavities
64 Troyer Horizontal Gourds
64 Troyer Vertical Gourds
2 T14'S - 28 Compartments
3 SMJ8'S - 24 Compartments
Bob Buskas
Posts: 600
Joined: Sat Nov 15, 2003 8:08 pm
Location: Wetaskiwin Alberta, Canada

Congrats on the feeding, once they get use to eating the egg, you can cut down feeding crickets. Just give them crickets for a treat once in a while.
Bob Buskas, Alberta, Canada (The Northern Sky's Colony) Supplimental feeding is the key during bad weather, but you must train them to feed ahead of time.
Dave Duit
Posts: 1932
Joined: Tue Nov 25, 2003 2:02 pm
Location: Iowa / Nevada
Martin Colony History: In 2020, 60 pair with 285 fledged youngsters. 83 total cavities available, 58 Troyer Horizontal gourds and 4 modified deep trio metal house units, 1 fallout shelter, owl cages around all units. Martin educator and speaker. President and founder of the Iowa Purple Martin Organization. Please visit www.iamartin.org and join.

Martins are chowing down big time at my location. I went through three dozen eggs today. Thursday May 21st should be warmer and help things out.
Mite control, heat venting, predator protection and additional feeding during bad weather add up to success.
Bob Buskas
Posts: 600
Joined: Sat Nov 15, 2003 8:08 pm
Location: Wetaskiwin Alberta, Canada

Right ON Dave, you got it right ! 100%
Bob Buskas, Alberta, Canada (The Northern Sky's Colony) Supplimental feeding is the key during bad weather, but you must train them to feed ahead of time.
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