[Female] Much more “relaxed” on nest. [Male] Rather “nervous” looking on nest, constantly looking around, tends to stretch neck up and forwards (like a chicken) to look at things. [Characteristic] 
Behaviour
O v e r a l l B o d y S h a p e
W i n g C o l o u r
S h o u l d e r s
H e a d S h a p e & N e c k
B a c k
E y e s
B i l l
L e g s
U n d e r w i n g
B e h a v i o u r