Egg shells

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Badger
Posts: 24
Joined: Sun Feb 26, 2017 3:37 pm
Location: Shenandoah Valley VA

Egg shells

Postby Badger » Sun Mar 17, 2019 6:37 am

This may have been covered but once the Martin's arrive when should I start feeding them egg shells. I want to feed them at the time when they'll do the most good. I have a limited supply and dont want to waste them. Thanks....

John Miller
Posts: 4718
Joined: Mon Mar 22, 2004 9:11 pm
Location: St. Louis, MO

Re: Egg shells

Postby John Miller » Sun Mar 17, 2019 6:52 am

Some postings and observations believe supplemental calcium may help with egg production, so you may want to offer some when you see the martins begin nest building. You could mix in some crushed oyster shells to make your supply go further. I observe martins initially seem more attracted to egg shells. That said, I also observe martins showing more interest in egg shells when they have young and may be carrying the shells to the young as grit. Candidly a lot of the benefit and purpose have never been clear to me, but martins do take to the shells.

pmlover
Posts: 782
Joined: Thu Apr 04, 2013 3:30 pm
Location: OH/New Concord

Re: Egg shells

Postby pmlover » Sun Mar 17, 2019 8:36 am

since i started using egg shells in addition to oyster shells my egg production increased tremendously and had about 10 nests with 8 eggs
2015 69 pairs 418 eggs 396 fledged
2019 I have 148 openings now
2016 100 pairs 600 babies fledged added another t-14 and have 126 openings now
2015 Jun 24 360 babies and 58 eggs also found one that had died
2017 632 babies 11died and 20 were killed by hawks
2015 74 pairs and 9 eggs 5/14
2010 3pairss
]JOINED PMCA JUNE 6,2018
2018 651 babies 5 hawk kills 11 floater kills 25 died in houses and 610 fledged

2014 80 pairs 283 babies 282 fledged one died

Robert
Posts: 63
Joined: Mon Aug 06, 2018 10:49 am
Location: Columbia , South Carolina

Re: Egg shells

Postby Robert » Sun Mar 17, 2019 8:57 am

Badger I like to use egg shells and crushed oyster shells like John Miller and pmlover , I have mine out when they arrive I have noticed that they sometimes would eat some around nest building time , but really bring a lot in to the young chicks as they grow.
Robert , South Carolina
PMCA member
38 year PM landlord
2018 season
21 pairs 107 eggs 99 fledged


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