When you judge a bird the first thing you need to know is overall type and what you would see on the bird in profile. In Ameraucanas the type is mostly medium. Medium size, medium length, medium tail, etc. But you should read the Standard to get a picture in your mind of what the ideal would look like and then see if your bird matches that criteria. If you have this picture it is easy to compare each of the bird’s traits to the Standard without spending too much time, but make sure you do know the specifics as well even more so if you are breeding than just judging. (Breeders will generally know their breed a little better than a judge though the judge’s knowledge is impressive because they are breeding and weighing their birds.)
Fluff really effects a bird’s profile. In Ameraucanas, excess fluff is a problem. Her fluff should be tucked up around the abdomen.
MAKE SURE the legs are straight and widely set. Knock-knees are a danger to her breed!
You also need to handle her. Examine the head, make sure it is nice and wide. Feel the breast and fleshing. She should have firm, substantial muscling (it doesn’t matter the breed, a healthy bird has good muscling and is well filled out but not fat. The amount of this muscling will be different but it means the bird is in good health. The keel (her breastbone) must be straight (otherwise a severe defect in her breed). If it’s not, it feels off. Draw your fingers along it to make sure it is straight. Go to her vent. Put your fingers between her pubic bones. If she is in lay you should be able to fit AT LEAST two fingers between them I think. Otherwise she won’t make a great layer.
Check for straight toes.
Draw out each wing and make sure it is not split and ensure the feathers are adequately wide.
Other things to consider: color. Don’t forget about undercolor but don’t give it undue emphasis.
Feathers condition. Obviously she should have a good diet and facilities. How she’s looking at the moment though is important to the show scene and not her personal qualities unless she has some issues caused by genetics and not the environment.