[Laura]

Is he moving his tail side to side like wagging it? if he is thats normal it just means he is happy enjoying life, and enjoying you if he is moving it up and down could be a sign of illness.
now the quivering I am not sure of keep an eye on him quivering can mean many things
fear nervousness uncertainty distrust, a change in tempature in the enviroment, sickness or it could be none of these not really sure just watch him and see if he keeps doing it.

 

[Laura]

I was in the kitchen. We do have air conditioning though.

might be to cold for him

 

[Laura]

it usually means a really BIG present is about to land on my shoulder.

hehehe....
I had never heard of it either till I read it on a few sites when I was trying to read up on Cockatiel behaviour it said some will actually wag there tail like a dog....lol I have yet to see either of mine do it

 

[Laura]

What site is that? I really don't think it sounds right. No bird i've known has ever wagged their tail, hehehe.

Spike - i've been watching and my two shiver if they are cold, or scared. Don't know if either of those would apply to when Spike was shivering.

if you do a google search it tells you that on many sites I agree Bea I have yet to see mine do it maybe there not happy to see me

Tail wagging: A bird, like a dog, may wag her tail to tell you that she is glad to see you. Tail wagging can also be a precursor to defecating. This is often helpful if you are trying to housetrain your bird.

Tail Wagging: you'll see your bird give his tail a quick "fan" and a vigorous side-to-side shake. This means "I'm content, I'm enjoying myself and feeling quite relaxed!" It's always a happy sight!

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