Bobwhite Quail Embryo Development Hatching eggs. Infertile, unincubated egg. Blastodisc located on top of yolk appears irregular in shape. Fertile, unincubated egg. Blastoderm larger, more regular in shape and has a “donut-appearance.” Day 1 Blastoderm enlarges in size. Day 2 “Donut-shape” greatly enlarged and embryo lies within the donut ring. Day 3 Beginnings of a circulatory system. Day 4 Circulatory system developing, embryo visible. Day 5 Circulatory system well developed. Formation of appendages. Day 6 Embryo in shell. Day 6 Notice brain to body size relationship. Day 7 Embryo in shell. Day 7 Brain continues to develop at rapid rate. Day 8 Embryo in shell. Day 8 Limb development evident. Day 9 Embryo in shell. Day 9 Wing development rapid. Development of egg tooth begins. Day 10 Embryo in shell. Day 10 Egg tooth seen on tip of beak. Eyes very conspicuous. Day 11 Embryo in shell. Day 11 Continued limb development. Day 12 Embryo in shell. Day 12 Beginnings of feather development. Day 13 Rapid wing development. 1 2 3 4 5 6 6 7 7 8 8 9 9 10 10 11 11 12 Twelve hours after hatching Day 14 Feather tracts seen on the back. Wings, feet, toes well developed. 12 13 14 Day 15 Increased formation of feathers. Day 16 Hardening of beak and egg tooth continues. Day 17 Eyelids have overgrown eyes. Day 18-21 Calcification of bone started. Toenails and down feathers on neck, thighs and wings present. Embryo enlarges. Remaining yolk sac enters the body cavity. 15 16 17 18-21 Pipping Chick pips into the air cell and begins pulmonary breathing. Chick begins pipping through the shell. Hatching Chick hatches and dries. 22 23 ANR-1410 John P. Blake, Extension Specialist, Professor; Kenneth S. Macklin, Extension Specialist, Associate Professor; Wallace D. Berry, Associate Professor; Robert A. Voitle, Professor Emeritus, all in Poultry Science at Auburn University; and Thomas A. Hess, Biological Sciences/Wildlife and Forestry, Auburn University For more information, call your county Extension office. Look in your telephone directory under your county’s name to find the number. Published by the Alabama Cooperative Extension System (Alabama A&M University and Auburn University), an equal opportunity educator and employer. Web Only, New Sept 2011, ANR-1410 © 2011 by the Alabama Cooperative Extension System. All rights reserved. www.aces.edu
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Bobwhite QuailEmbryo Development
Hatching eggs. Infertile, unincubated egg. Blastodisc located on top of yolk appears irregular in shape.
Fertile, unincubated egg. Blastoderm larger, more regular in shape and has a “donut-appearance.”
Day 1Blastoderm enlarges in size.
Day 2“Donut-shape” greatly enlarged and embryo lies within the donut ring.
Day 3Beginnings of a circulatory system.
Day 4Circulatory system developing, embryo visible.
Day 5Circulatory system well developed. Formation of appendages.
Day 6Embryo in shell.
Day 6Notice brain to body size relationship.
Day 7Embryo in shell.
Day 7Brain continues to develop at rapid rate.
Day 8Embryo in shell.
Day 8Limb development evident.
Day 9Embryo in shell.
Day 9Wing development rapid. Development of egg tooth begins.
Day 10Embryo in shell.
Day 10Egg tooth seen on tip of beak. Eyes very conspicuous.
Day 11Embryo in shell.
Day 11Continued limb development.
Day 12Embryo in shell.
Day 12Beginnings of feather development.
Day 13Rapid wing development.
1 2 3
4 5 6 6 7 7
8 8 9 9 10 10
11 11 12
Twelve hours after hatching
Day 14Feather tracts seen on the back. Wings, feet, toes well developed.
12 13 14
Day 15Increased formation of feathers.
Day 16Hardening of beak and egg tooth continues.
Day 17Eyelids have overgrown eyes.
Day 18-21Calcification of bone started. Toenails and down feathers on neck, thighs and wings present. Embryo enlarges. Remaining yolk sac enters the body cavity.
15 16 17 18-21
PippingChick pips into the air cell and begins pulmonary breathing. Chick begins pipping through the shell.
HatchingChick hatches and dries.
22 23ANR-1410
John P. Blake, Extension Specialist, Professor; Kenneth S. Macklin, Extension Specialist, Associate Professor; Wallace D. Berry, Associate Professor; Robert A. Voitle, Professor Emeritus, all in Poultry Science at Auburn University; and Thomas A. Hess, Biological Sciences/Wildlife and Forestry, Auburn University For more information, call your county Extension office. Look in your telephone directory under your county’s name to find the number.
Published by the Alabama Cooperative Extension System (Alabama A&M University and Auburn University), an equal opportunity educator and employer.
Web Only, New Sept 2011, ANR-1410
© 2011 by the Alabama Cooperative Extension System. All rights reserved. www.aces.edu
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