4-H Embryology Day 14 Live Candling
This is Nebraska Extension in Lancaster County’s live candling recorded from EGG Cam 14 days after eggs are placed in incubators as a part of the 4-H Embryology school enrichment program. We keep track of how many winners and quitters are in their incubator. Quitters are removed so they don’t rot. You may watch eggs hatch on 4-H EGG Cam at lancaster.unl.edu/eggcam! Locally, the 4-H youth development program is a partnership between Nebraska Extension and Lancaster County government. Learn more about the Lancaster County 4-H program at lancaster.unl.edu/4h.
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[00:00:13.824]Alright, it looks like we've found a
developing embryo on our first egg today.
[00:00:19.959]You can recognize those red networking
blood vessels and veins.
[00:00:24.719]As I rotate the egg,
you may see that dark object moving.
[00:00:29.691]That is the growing developing embryo,
and at this stage of development,
[00:00:35.371]you can recognize certain structures
as the toes and the beak.
[00:00:40.801]Remember, I'm shining my light
through the air cell here.
[00:00:54.694]You can see it kicking a little bit there.
[00:01:04.205]and for today's recording,
we are going to be looking at 21 eggs.
[00:01:25.760]For our second egg, we have another
developing embro; so another winner.
[00:01:32.140]You can really see a lot of activity
inside of this egg.
[00:01:36.504]At this stage of development, the embryo
will be recognized as an actual chick.
[00:01:43.434]You may see the toes towards the bottom
of the dark section of the embryo.
[00:01:51.279]This is day 14 of development.
[00:01:58.209]As I rotate it a little bit, the black
structure toward the center
[00:02:02.457]is going to be the head, and you may see
the eye as well in it's very center.
[00:02:19.664]Two winners so far!
[00:02:27.426]This egg has a little bit darker shell.
[00:02:31.740]It's a brown egg. It's going to a harder
see as we candle.
[00:02:34.989]But if you look closely to the air cell,
[00:02:39.440]you can recognize the blood
vessels and veins
[00:02:42.718]and in the center, you can see the
[00:02:48.931]So we have another winner.
[00:02:51.813]The previous two eggs had white shells,
[00:02:55.849]so they were easier to shine a light
through and candle.
[00:03:06.033]We have another brown one here, but
we have another winner!
[00:03:11.214]You can recognize those red blood vessels
and veins towards the top of the shell.
[00:03:17.378]You can see the embryo - that dark
structure in the very center,
[00:03:22.657]we are going to recognize as the eye.
[00:03:31.736]We have 4 winners so far!
[00:03:46.478]This is another darker, brown shelled egg.
[00:03:50.025]So it's going to be harder to candle,
but we can still see those healthy
[00:03:54.054]networking blood vessels and veins
towards the top.
[00:03:57.538]Closer to my candling light, you are able
to see the embryo.
[00:04:03.685]If I rotate it around toward the camera,
that dark structure in the center
[00:04:08.716]is the embro.
[00:04:13.427]You can see it moving gently on the inside.
[00:04:21.984]That's five winners!
[00:04:33.386]Here we find a quitter.
[00:04:37.087]This an embryo that is no longer
[00:04:40.685]We won't find any yolkers today,
because those were all culled,
[00:04:43.900]or removed from the incubator,
on the day 7 candling.
[00:04:46.349]So this one between day 7 and day 14
turned into a quitter.
[00:04:54.677]It is no longer developing.
[00:04:57.759]These eggs will be culled, just like the
yolkers were on day 7.
[00:05:13.066]Looks like we have another quitter.
[00:05:16.271]We can recognize this one a little easier
by the blood ring in the center.
[00:05:20.852]Just like the previous one, something
happened between days 7 and 14
[00:05:30.146]to cause it to stop developing.
[00:05:35.568]You can see it was a little bit further
along than the previous one
[00:05:39.734]You can see that darker structure
which was the developing embryo
[00:05:44.866]so you can see it made it a little
further into the developmental process.
[00:05:54.982]You can recognize this one clearly as
[00:05:59.013]It has the red blood vessels and veins
throughout the shell of the egg.
[00:06:04.959]We have another healthy, developing
[00:06:08.674]This one have a green shell so it's very
hard to see through the shell of this egg.
[00:06:14.304]You can see in the center the dark
structure rotating is the
[00:06:29.246]This is a good example here.
[00:06:35.659]You can see the healthy networking blood
vessels and veins.
[00:06:39.491]If I rotate it towards the camera,
that dark structure
[00:06:42.323]is our developing embryo.
[00:06:46.287]You can see it moving inside the egg.
[00:07:01.329]We have 7 winners and 2 quitters so far.
[00:07:08.342]This one is a darker colored green egg.
[00:07:11.841]It is going to be harder to shine our
[00:07:15.238]This is a winner!
[00:07:17.687]You an see some healthy networking blood
vessels and veins
[00:07:21.101]towards air cell or flashlight we are
shining into the egg.
[00:07:24.799]If you look closely, there will be a dark
shadow in the bottom of the egg
[00:07:29.364]which is the developing embryo.
[00:07:36.850]This one is a little clearer. You are
able to see the structure of the head.
[00:07:40.905]You may see the beak toward the
middle of the egg.
[00:07:51.439]You can see it moving
gently in the center.
[00:07:57.736]See all those healthy networking blood
vessels and veins.
[00:08:00.601]This one is a good example, as you can
clearly see the outline of the
[00:08:03.999]developing chick. One day 14, you are able
to see the toes and beak.
[00:08:13.244]It closely resembles how it will look on
day 21 when it will hatch.
[00:08:24.044]Nine developing embryos and 2 quitters
[00:08:30.418]This one we are able to see very clearly.
You can see lots of healthy networking
[00:08:35.289]blood vessels and veins.
[00:08:37.947]Shining through the air cell at the top,
we can see the air cell gets a little bit
[00:08:42.012]bigger from last week's candling,
and the longer it develops.
[00:08:54.221]You can see the embryo
moving on the inside.
[00:09:05.415]This one is a really good example since
it has a white shell.
[00:09:27.487]This one has a brown shell, so it'll
be a little harder to candle.
[00:09:32.900]But we can still see healthy blood vessels
and veins toward the air cell of the egg.
[00:09:40.513]It I rotate it a little bit, you can see a
[00:09:43.594]darker shadow towards the bottom
half of the egg.
[00:09:45.693]That is our developing embryo.
[00:09:58.777]This one is a quitter. As I rotate
the egg you can see the
[00:10:02.002]air cell doesn't stay in one place, so
this one is will no longer develop.
[00:10:15.247]It almost looks watery on the inside.
This egg will be culled because
[00:10:20.811]it will no longer produce an
embryo to hatch.
[00:10:33.870]Here is another winner. You can see the
embryo move about in the bottom half
[00:10:38.335]of the egg. As I rotate it, you have see
the healthy network of blood
[00:10:45.031]vessels and veins.
[00:10:49.245]You can see the outline of the embryo -
the shadow on the bottom.
[00:10:55.525]You can see it moving on the top
of your screen.
[00:11:07.685]We have 12 winners and 3 quitters so far.
[00:11:14.681]Another winner here!
[00:11:17.696]We can tell the blood vessels and veins
are thicker and more developed this week
[00:11:23.943]than they were on day 7.
[00:11:27.074]If I rotate it toward the camera, you
can see the outline of the embryo.
[00:11:32.855]You can see it moving, ever so slightly.
[00:11:40.850]At this stage of development, the body
will be almost entirely
[00:11:46.331]covered in feathers, and the toes and beak
will be almost completely formed.
[00:12:09.391]Here we have another winner!
[00:12:13.832]You can recognize those health networking
blood vessels and veins
[00:12:16.697]towards the air cell.
[00:12:24.110]For those of you who may be just
joining us, we are doing day 14
[00:12:29.024]of development candling. So we are able
to see structures and
[00:12:32.205]recognize the eye, the beak and the toes.
[00:12:37.253]We can see a healthy networking of blood
vessels and veins in this egg.
[00:12:42.933]So we have a winner!
[00:12:47.181]Looks like we have another winner!
It's easy to distinguish
[00:12:52.261]with those healthy networking blood
vessels and veins.
[00:12:55.145]This one paints a clearer picture as we're
shining through a white egg shell.
[00:13:00.040]We are able to see structures more clearly
as if we were to candle through a darker
[00:13:04.354]pigmented egg such as a green or a brown.
It would be harder to see an image
[00:13:10.185]inside that egg. We can see that
developing embryo rotate and move
[00:13:15.815]inside of this egg. So we can tell that
another healthy, developing embryo.
[00:13:21.728]So we have another winner! For total
of 15 winners and 3 quitters.
[00:13:31.740]This one is a green egg. If I rotate it
slightly, you can see the network of
[00:13:41.284]blood vessels and veins. Remember, we are
shining our light through the air cell.
[00:13:46.731]And on the top of it, we can see those
[00:13:51.112]Just like the skin on our bodies.
[00:13:55.243]We see the developing embryo - that
dark shadow - on the inside.
[00:14:06.437]If I rotate a little, this is egg # 20, we
have another winner.
[00:14:14.642]We can see those healthy networking of
blood vessels and veins.
[00:14:20.913]Shining through the air cell, we can see
the dark shadow
[00:14:26.676]of the embryo on the inside.
[00:14:31.040]You may be able to see it rotate or move
slightly as I rotate the egg.
[00:14:38.142]Showing great signs of a healthy embryo.
[00:14:43.767]Now for #21. We have another developing
[00:14:51.513]It may be harder to see on you screen, but
there will be a shadow towards the top.
[00:14:56.693]We see the beak starting to appear
in this egg as it's moving in the shell.
[00:15:14.733]Again we can see those healthy networking
of blood vessels and veins.
[00:15:19.714]And if I rotate if slightly, you can
see the shadow of the developing embryo.
[00:15:29.393]For those of you who may be
just joining us,
[00:15:32.423]it is day 14 of candling. So day 14 of
development of these eggs.
[00:15:38.871]They've been incubating for 14 days.
[00:15:41.952]This one will give a clear picture.
This is a white egg shell egg.
[00:15:47.082]We are shining the light through the air
cell, the glowing structure at the top.
[00:15:55.228]Those red lines are the blood
vessels and veins
[00:15:57.726]as this egg grows and develops with this embryo.
[00:16:01.657]You can see the dark shadow in the center
which is the developing embryo.
[00:16:08.287]We'll look at one more white egg shell egg
for those of you who may have
[00:16:14.017]just been joining us.
[00:16:22.596]If I rotate the egg, you can see the
outline of the embryo towards the center.
[00:16:27.327]That dark, black spot in the center
is the eye.
[00:16:32.623]It looks a little more developed
than last week.
[00:16:36.739]We can see the outline of that embryo
on the inside or the center of the egg.
[00:17:01.941]OK, we'd like to thank everyone for
joining us today.
[00:17:05.922]Make sure to check out our other
embryology resources located at
for more information.
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