Two Warblers and Another Robin

It happened this way last year too. A Yellow-rumped Warbler arrived on the same day as the Wilson Warbler. I could have the IDs wrong, but that's what I think these two birds are. If I remember correctly, we
should be keeping our eyes open for the Western Tanager, which usually shows up for one day, around the time the warblers arrive. Their stay is short; they're all on their way to someplace else. We're just a layover, the Dharma way-station. We could blink and miss them, literally.
Okay, so here's another robin for you. At first I thought she had a mess of watery wet feathers, but the photo close-up doesn't look like that to me. When I look at the darkness on her chest I think it's blood. What do you think? What would make a bird look like this? She was eating and flying, and even though she looked thin, she looked like she could take care of herself.

An update: Thanks to the insight of two incomparable commenters, Valown and CCorax, it looks like the explanation for Ms. Robin's dark chest feathers could be an unusual molt. We are glad to know and even more appreciative of the very smart people who read our humble blog.

The arrival of the warblers is some evidence of a spring trying to emerge. We are, however, expecting a rainy weekend with a low of 34F on Saturday. Any lower and you know what happens? Snow. Yes, snow.

Have a good weekend, friends.