Here are pictures of a few birds whose identity eludes me.
Can you help me identify them?

The first two are certainly of a Myiarchus.
The second two might be of an Altamira Oriole.

Your help is greatly appreciated.
Please email me if you know what any of them are.

This just in! Both birds have been identified; the first is an Ash-throated Flycatcher (Myiarchus cinerascens) and the second is a juvenile Orchard Oriole, which you can see more of here.