Chick Development inside the Egg: From Egg to Parrot

Chick Development inside the Egg: From Egg to Parrot – Illustrations of the development of a chick inside the egg during the different stages of development

Newly hatched eclectus chick

Useful Information: Breeders’ Resources (covers everything from handfeeding to potential breeding / chick problems) … Incubation InformationInformation on Housing Chicks, Temperature Requirements, etc.

This webpage features two photo series that show the growth of an embryo in an egg. The eggs were candled and then photographed. The process of candling allows you to view the interior of an egg …

  • The series of images (and the most life-like) courtesy of Brinsea – the leaders in egg incubation
  • The amazing “Inside View” graphic is courtesy of Susanne Russo.
  • The next photo series was produced by the University of California, Davis. It features candled eggs — Day 1 through Day 17 (please click on photos for enlarged images, with additional information).
  • Next, the photos of candled cockatiel eggs – courtesy of the Parrot Society of United Kingdom — including some incredible hatching photos.
  • Also of interest:

The images below by Brinsea Products Inc. – the leader in egg incubation

Embryo in egg
Developments inside the egg

Orange-winged Amazon Parrot Incubation Series

© 1998 UC Regents, University of California, Davis

Permission to publish the below photo series was kindly provided by Professor James R. Millam, Department of Animal Science – … Please note that some additional information was added by Avianweb for clarification.

Please click on the images to enlarge

Day 1 Egg / Tag 1 Ei
Beginning of alimentary tract; vertebral column; nervous system and head
Day 2 Egg / Tag 2 Ei
Beginning of ears and heart. Heart is beating.
Day 3 Egg / Tag 3 Ei
Beginning of nose, legs and wings
Day 4 Egg / Tag 4 Ei:
Beginning of tongue
Day 5 Egg / Tag 5 Ei:
Formation of reproductive organs
Day 6 Egg / Tag 6 Ei
Beginning of beak
Day 7 Egg / Tag 7 Ei
Day 8 Egg / Tag 8 Ei
Beginning of feathers
Day 9 Egg / Tag 9 EiDay 10 Egg / Tag 10 Ei
Beginning of hardening of beak
Day 11 Egg / Tag 11 Ei
Appearance of scales and claws
Day 12 Egg / Tag 12 EiDay 13 Egg / Tag 13 EiDay 14 Egg / Tag 14 EiDay 15 Egg / Tag 15 Ei
Day 16 Egg / Tag 16 Ei
Scales, claws and beak becoming firm
Day 17 Egg / Tag 17 Ei
Beak turns toward air cell
Nineteenth day – yolk sac begins to enter body cavity Twentieth day – The chick is in hatching position. It has pierced the air cell with its beak. Pulmonary respiration has begun. Twenty-first day (average for poultry): The chick breaks the shell with its egg tooth (the sharp horny structure on the upper beak, which will disappear within days of hatching). An enlargement in a muscle in the back of the neck also helps the chick force the egg tooth through the shell.

The Parrot Society of United Kingdom was so kind to allow us to publish these really interesting illustrations that show the development of the chick inside the egg — at its different stages of development.

Egg To Parrot
Developing embryo - Day 10
Developing embryo - Day 15
Photo of author

Team Beauty of Birds's team of experts includes veterinarians, biologists, environmentalists and active bird watchers. All put together, we have over half a century of experience in the birding space.

You can meet our team here.
Team Beauty of Birds is separate from the “Parrot Parent University” parrot training course and its instructors.