Dirty diapers?

Forgive my grainy high ISO picture and allow an ornithology 101 question:
Ever since the eggs hatched, many of my captures of the Pileated parents leaving the nest show them carrying some matter/stuff in their beaks. I’m assuming it is the bird world equivalent of “taking out the garbage” but would appreciate a more educated explanation if possible.
This is the clearest shot I’ve achieved so far. What is that?

IMAGE LINK: https://www.flickr.com …94438230@N07/14​246937216/

That's better than what the Robins do with it, they consume it! I have video of them doing it on my Flickr page. Got to get it out of the nest!

Here is another poor shot of the male flying out with similar "stuff."
Photography lessons aside, I would really appreciate an explanation of what that is.

IMAGE LINK: https://www.flickr.com …94438230@N07/14​269959474/

You are right Barry.

Keeps getting better, where are the kids?

Yes you are correct.

" While the babies are growing, the parents will carry away the waste products from the nestlings. The waste is in the form of neat little bundles called "fecal sacs".

Here is my Flickr link to how the Robin's do it! https://flic.kr/p/fem6​gw They did this every time they fed the chicks. I have two short videos showing this process. This is the second video..https://flic.kr/p/fe6m​FF

Nice shots Barry, yes the term is faecal-sacks I belive.

2n10 wrote in post #16930021
You are right Barry.

Thanks John. I'll keep trying to get a better shot.

Oldjackssparrows wrote in post #16930096
Keeps getting better, where are the kids?

I haven't seen one yet Bret but expect to any day now. You can sure hear them however. When the parent lands, it sounds like a bee's nest inside. Thanks!

butterfly2937 wrote in post #16930151
Yes you are correct.

" While the babies are growing, the parents will carry away the waste products from the nestlings. The waste is in the form of neat little bundles called "fecal sacs".

Thanks for the confirmation butterfly. I appreciate it.

SJC from VT wrote in post #16931024
Here is my Flickr link to how the Robin's do it! https://flic.kr/p/fem6​gw They did this every time they fed the chicks. I have two short videos showing this process. This is the second video..https://flic.kr/p/fe6m​FF

Very interesting, Sandy. Great information. Thanks for sharing that!

Lester Wareham wrote in post #16931200
Nice shots Barry, yes the term is faecal-sacks I belive.

Thank you much, Lester. Not exactly the most attractive thought, but fascinating none the less.

Fascinating behavior you've documented here Barry.
I knew they had to remove waste products from the nest, but didn't know it came packaged thusly. Kinda reminds me of an owl casting. Learn something new everyday.....thanks to you!