My little guy Chipper has had 3 episodes of night frights. They seem to happen about one or two hours after bedding them down. It is a terrible sound because when one is in a fright the other one is also. I place a cover partially on the top of cage and night lights just behind the cage. Last night I watched him and Gypsy flapping in their separate cages. Chipper kept on going for a while. I waited until he stopped and he was very still on the bottom of the cage. Then I picked him up (normally never lets me do this) and cuddled him with reassurance and he calmed down.
Night frights often have such a subtle reason. My cat was lying on the bed not even near the birds.
I see no signs of mice around. I am going to take out their ladders each night now just in case.
Anyone else having Parakeets with night frights????