the bird your looking for is the eastern meadowlark
The small bird with a yellow belly and black head is called a Yellow-bellied Flycatcher.
I'm assuming you mean that there used to be stripes and now the stripes are receding and it is just yellow on top of his head. This happens because your bird is getting older. This is normal so there is no problem. If this is not what you were asking about, then I need more information. :)
cedar waxwing
The yellow bird is most likely a yellow crowned Kinglet and the other a red crowned kinglet
The bird species known for having a yellow belly and a black head is the Yellow-headed Blackbird.
love bird
not sure really
The Eurasian Blackbird is a black bird with a yellow beak.
Sounds like you have a golden crowned kinglet.
The small bird with a black stripe on its head is called a chickadee.
The small white bird with a black head is called a Pied Wagtail.
The small bird with a white and black head is called a pied wagtail.