Because they desperately want to be stalking and killing said birds, most likely. Cats are born hunters, and will often kill just for the fun of it. Basically, that quivering chirping is an expression of combined excitement and desire.
The cackle sound a cat makes when it sees birds is more of a clicking noise. Cats do this when stalking prey such as birds, bugs, and even squirrels. It is normal behavior for cats and is called chatter.
I am no doc but it mainly wants to eat it
because the sock is in their mouth, therefore they have to muffle a funny sound!
It means it probably wants to play with you.
No. Cats will vocalize around other cats, and a mother cat will meow to call her kittens.
A silent meow doesn't mean anything i know this may sound strange but quite a lot of cats cannot meow they try but they can't. i have 2 female cats and they both cannot meow.
Cats won't normally meow to communicate with other cats, but they will meow to communicate with humans. Sometimes they meow to show you they need something (like if they have ran out of food) or just to respond to what you are doing (like calling their name).
Most cats won't meow at birds. That scares the birds away and cats don't want to scare away the birds. They want to catch the birds. My cats sit at the kitchen window watching birds and they don't meow. They cackle or chatter! It is absolutely funny to watch them cackle or chatter at the birds. I don't know how they could ever catch a bird.
because the sock is in their mouth, therefore they have to muffle a funny sound!
It means it probably wants to play with you.
a cats voice
No. Cats will vocalize around other cats, and a mother cat will meow to call her kittens.
Birman cats do not meow a lot; in fact, they are known for being docile and quiet.
Yes, all kittens meow even cats meow.
by their mouth
what you do is you say ow not meow in a cat pitch.
meow. meow.
taking too much meow meow
Indeed