The vast majority of references to birds and other flying animals (moths, butterflies, ect.) apply to Blanche
'there is somethingabout her uncertain manner [...] that suggests a moth'
Like a bird, Blanche is terrified of cats, twice in scene one a cat screeches and both times Blanche overreactions
'catches her breath with a startled gesture'
'springs up' asking 'what's that?'
In scene two, Stanley pulling out Blanches dresses comments on the 'feathers and furs' that she has come to 'preen herself' in.
In scene 3, Stanley shouts at Blanches and Stella saying 'you hens cut outthat conversation in there!'
Blanche figures herself a s a bird in her letter to Shep Huntley in scene 5, stating that she has spent the summer 'on the wing', making 'flying visits' and she might 'swoop' down to Dallas to see him
Scene 5 we also learn the hotel Blanche stayed in in Laurel was named the Flamingo
Scene 5, Blanche states that 'soft people' like her have to 'put on soft colours, the colours of butterfly wings.'
In scene 6, Mitch refers to Blanche as ''light as a feather'
Scene 7, Stanley refers to her twice as a 'canary bird'
Scene 7, Stella explains that Blanche was always 'flighty' at home
Scene 8, Blanche tells a joke involving a talking parrot, the second joke in the play involving a bird
Stanley in scene 10 ask Blanche 'What you've got all them fine feathers on for?'
In scene 11, the matron must grab blanches arm to prevent her 'flight'