Remember the eagles for our conference:
The Decorah Eagles nest is located in a patch of woods to
the east side of the Siewers Spring road bridge near the trout hatchery. Since
we've been watching, the eagles have produced 23 eaglets. In general, they lay
eggs in mid-February. The eggs hatch in late March to early April and the
eaglets stay in the nest for 75-80 days, fledging in mid-June. This cam can be
watched live at: http://www.ustream.tv/decoraheagles
To learn more, visit: http://bit.ly/1MR4fCw.
Two eggs have hatched, but here is information on the third egg:
Will the remaining egg hatch? Blog: http://bit.ly/1oFxNyz
As of this morning, the unhatched egg in Decorah is somewhere between 49 and 42 days old. Can it still hatch? Eagle eggs have hatched as late as 44 days after they were laid. If this is the last egg, we still have roughly two days in which hatch could occur. However, eggs have never hatched this far apart in Decorah before. Given the dates, it is possible that we've seen the hatch of eggs number two and three instead of eggs number one and two as we initially assumed. Roughly 3% to 12% of bald eagle eggs fail to hatch based on the studies I read, although some sources put the number a little higher, at 10% to 25%.
So why wouldn't the egg hatch? Eggs fail to hatch because they are either infertile or nonviable.
-Insufficient incubation. Incubation is fairly complex! Eggs must be kept at the proper temperature and humidity and turned regularly. Freshly laid eggs can spend time in the zone of suspended development (roughly 28.4 to 80.6°F) with no harm to the egg or embryo, but eggs must remain between about 99 and 104°F once development starts. Time off the eggs regulates humidity and helps keep pores from clogging. Turning or rolling the eggs prevents the developing embryo from sticking to the side of the egg, brings it into contact with fresh 'food' and important nutrients supplied by the yolk and white, and assures proper development of the membranes that exchange gas and protect the embryo from contaminants.
-Piercing or cracking of the shell. If the egg shell is pierced or cracked before the embryo is fully developed, it will die. This can happen if the egg is jostled too vigorously, stepped on, or damaged or destroyed by an intruder - something that has been documented in many species of birds.
-Insufficient nutrition. Given all that we've seen the eagles eat, this doesn't seem to be especially likely in Decorah. But if a female bird is insufficiently nourished before she begins laying eggs, her eggs won't have the nutrients needed to nourish the developing embryo.
-Bacterial or chemical contamination. Although the embryo is protected by a shell and layers of membrane, contaminants can sometimes make their way into an egg and impede or kill the embryo inside it.
It's hard to believe that we could have an unhatched egg after so many years of success. How many times have we been worried about something only to have it all turn out right? But eggs don't always hatch and even excellent parents like our Mom and Dad experience failure. I'm glad we have D24 and D25 to watch this year and I look forward to studying the dynamics and rearing of two siblings if the egg doesn't hatch, even though I really wish there were three. If we have a chance, we'll retrieve the egg for inspection and we will also review the video record to determine how much time was spent off the first egg.
Will the remaining egg hatch? Blog: http://bit.ly/1oFxNyz
As of this morning, the unhatched egg in Decorah is somewhere between 49 and 42 days old. Can it still hatch? Eagle eggs have hatched as late as 44 days after they were laid. If this is the last egg, we still have roughly two days in which hatch could occur. However, eggs have never hatched this far apart in Decorah before. Given the dates, it is possible that we've seen the hatch of eggs number two and three instead of eggs number one and two as we initially assumed. Roughly 3% to 12% of bald eagle eggs fail to hatch based on the studies I read, although some sources put the number a little higher, at 10% to 25%.
So why wouldn't the egg hatch? Eggs fail to hatch because they are either infertile or nonviable.
-Insufficient incubation. Incubation is fairly complex! Eggs must be kept at the proper temperature and humidity and turned regularly. Freshly laid eggs can spend time in the zone of suspended development (roughly 28.4 to 80.6°F) with no harm to the egg or embryo, but eggs must remain between about 99 and 104°F once development starts. Time off the eggs regulates humidity and helps keep pores from clogging. Turning or rolling the eggs prevents the developing embryo from sticking to the side of the egg, brings it into contact with fresh 'food' and important nutrients supplied by the yolk and white, and assures proper development of the membranes that exchange gas and protect the embryo from contaminants.
-Piercing or cracking of the shell. If the egg shell is pierced or cracked before the embryo is fully developed, it will die. This can happen if the egg is jostled too vigorously, stepped on, or damaged or destroyed by an intruder - something that has been documented in many species of birds.
-Insufficient nutrition. Given all that we've seen the eagles eat, this doesn't seem to be especially likely in Decorah. But if a female bird is insufficiently nourished before she begins laying eggs, her eggs won't have the nutrients needed to nourish the developing embryo.
-Bacterial or chemical contamination. Although the embryo is protected by a shell and layers of membrane, contaminants can sometimes make their way into an egg and impede or kill the embryo inside it.
It's hard to believe that we could have an unhatched egg after so many years of success. How many times have we been worried about something only to have it all turn out right? But eggs don't always hatch and even excellent parents like our Mom and Dad experience failure. I'm glad we have D24 and D25 to watch this year and I look forward to studying the dynamics and rearing of two siblings if the egg doesn't hatch, even though I really wish there were three. If we have a chance, we'll retrieve the egg for inspection and we will also review the video record to determine how much time was spent off the first egg.
Homework:
Language Arts:
- 20-30 minutes of reading of a NON-FICTION book
- Author's 3-2-1 due in 24 hours!!!!
To Read Nonfiction Well....
- Make a connection to your text
- Preview the whole text and predict how it might go:
a) Use prior knowledge of the topic
b) Scan the text features
- Figure out the text's structure and use it to determine importance:
1. Problem/ solution
2. Compare/ contrast
3. Cause/ effect
4. Chronological
- Class code is: LD8YB
Science Homework:
Social Studies Homework:
4th grade Mathematics
Homework is: none
Complete your thatquiz.org assignment( Due April 22 , 2016)
Class home page: http://www.thatquiz.org/tq/classpage?00f012367898571
We are in the lab making sure everyone is able to log in to Compass Learning. It seems like everyone is in good shape. For your records, this is how to log in from home.
- Follow this link: https://www.thelearningodyssey.com/
- Type in username, which is the student’s initial / number combination (ex - scl3)
- Type in the password, which is the student’s birthdate (ex - 2122005)
- Type in the school name (Covington)
Dance Mat Typing is a good program to start learning and improving keyboard skills. As a reminder, here is the link:
Dear BCS Parents/Guardians,
Birmingham Public Schools has started a new initiative this year called "Student Spotlight". The hope is to get to know students better, both in and out of the classroom. Once a month at BCS, one student will be highlighted on the school website and possibly on the district website. If your child is interested in being the October Student Spotlight for BCS, please click Student Spotlight, complete the form and submit it. Selection will be done by a random draw. The form must be detailed and fully complete in order to be considered and go into the random selection. Parent/Guardian permission is required on the form.
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