• Skip to secondary menu
  • Skip to main content
  • Skip to footer
  • HOME
  • About
  • The Rules
  • Technology
  • Terminology
  • Lessons Learned
  • About Me
  • The UGLY

Feathers and Fuzz

one woman's cure for the empty-nester blues

  • Index of Posts
  • Meet the Feathers
  • Meet the Fuzz

Feathers

Egg Rotation During Incubation

May 20, 2018 by MoJo

I don't think we've ever talked about egg rotation during incubation.  Female bird parents, at least the songbirds nesting in my bird houses, rotate their eggs frequently during the incubation period.

So why do birds rotate their eggs?  The obvious answer would be to evenly heat the egg while the female parent is sitting on the nest.  However, doing some research, I learned it is much more complex than just heat distribution.  Developing chicks need to "float" in the middle of the egg shell.  Keeping the embryo afloat ensures it gets enough albumen to fuel its growth, and prevents the embryo from sticking to the shell.  I will never cease being amazed at the details of our Creator's design!!

Meanwhile, we wouldn't be human if we didn't study this design at its smallest detail.  Here's a link to a short Audubon article about a study conducted on egg rotation -- artificial eggs inserted in a nest and outfitted with sensors.  Incubating Bird Eggs is More Complex than you Think

In the photos, you will see a nest of Eastern Bluebird eggs in different positions over a 30 minute period.

 

BB Eggs Position 1

9:27

BB Eggs Position 2

9:35

BB Eggs Position 3

10:00

Filed Under: Bluebird, Feathers Tagged With: Eastern Bluebird, Egg Rotation

Fledgling’s Food-Begging Behavior

May 17, 2018 by MoJo

In my last post, I made reference to a fledgling's food-begging behavior.  As if on cue, two of the Eastern Bluebird fledglings showed up at the worm feeder to put on a food-begging show.  In the feature video, you will clearly see their yellow-lined, gaping beaks and the repeated flutter of their wings as they make their best effort to draw Daddy Blue's attention.  When you are out and about, if you see two birds together -- one with gaping beak and fluttering wings -- you are no doubt seeing a parent and a recently-fledged youngster.

https://www.feathersandfuzz.com/wp-content/uploads/2018/05/Begging-Video.mp4

Meanwhile -- The Nests Keep Coming

We are now up to 10 nests in 2018.  The "rural" Bluebird pair are preparing for Brood #2 in the East house.   After the black bear's visit, I took down the South house -- it's getting relocated!  The 10th nest under construction belongs to a pair of House Finches.  This is an on-camera first for The Retreat.  The pair chose the platform used by the Carolina Wrens in 2017.  This platform sits almost-directly over my outdoor grill.  Last night, when  I headed out to preheat the grill, I received quite a scolding from momma Finch.  Apparently I was impeding her construction schedule.  She was perched in a nearby tree - beak full of grasses.

In the photo of the Finch nest, you will see the female Finch in the nest.  The male is perched on the side of the platform with his red head barely discernible in the available light.  I found it interesting to observed yet another variation in how a nest is properly constructed -- noting the greenery used by the Finch in the nest's foundation.  This is in contrast to the Wren's woven castle of grass and leaves -- the Bluebird's exclusive use of grass/pine straw -- and the Chickadee's complex layers of moss, grass, and "down".

Eastern Bluebird Nest - May 2018

"Rural" Bluebird Nest #2

House Wren Nest - May 2018

House Finch Pair/Nest

Filed Under: All the Others, Bluebird, Feathers Tagged With: Eastern Bluebird, Finch Nest, Fledgling Food-Begging, House Finch

  • « Go to Previous Page
  • Page 1
  • Interim pages omitted …
  • Page 25
  • Page 26
  • Page 27
  • Page 28
  • Page 29
  • Interim pages omitted …
  • Page 69
  • Go to Next Page »

Footer

Contact Us*

Get Social & Follow Us On

This is the day the Lord has made; let us rejoice and be glad in it. Psalm 118:24

See "First Blog"

Copyright © 2025 Feathers and Fuzz