[Cody]

A month is still a short time to expect too much, he might just be a bird that is more on the shy side. Do you have a separate cage for the cockatiel?

 

[Cody]

He may be a bird that would benefit from having a budgie friend, sometimes another budgie friend can make a big difference for some birds.

 

[Cody]

A budgie will usually be a another budgie's best friend you won't know if the cockatiel will be a good influence until you try it, hopefully he will benefit by having another bird in the same room. There is also a chance that the cockatiel will be scary to him so don't force an introduction.

 

[Cody]

That's great, could be that one thing was making him nervous.

 

[Cody]

You can never predict what will happen but that I think is unlikely. I have had several species of birds at one time and although they had separate cages they all had out of the cage time together and they did not interact much at all.