Fat hummers? (1 Viewer)

It's begining to get somewhat chilly here at night as the summer winds down. I haven't seen an adult hummingbird here since September 2nd, and even the hatch year birds that I've been watching all summer have gone. Right now I have three - four Hatch Year Males that showed up a few days ago. One of them has a very distiguishing feature: a feather boa. Near his throat there appears to be large fat sacks under the feathers, puffing them up and creating the look of a scarf.
Do hummingbirds get that big around the throat? I've never seen one like this, but I've only really been watching them for a year.
Here are some photos:
http://www.crickie.com/wp-gallery2.php?g2_view=core.ShowItem&g2_itemId=11269
http://www.crickie.com/wp-gallery2.php?g2_view=core.ShowItem&g2_itemId=11266
http://www.crickie.com/wp-gallery2.php?g2_view=core.ShowItem&g2_itemId=11246
http://www.crickie.com/wp-gallery2.php?g2_view=core.ShowItem&g2_itemId=11180
Heather
Athens, GA

Wow -- haven't seen that before. Great photos!

Looks noraml to me, hummers are very flexible creature and also of course it is migration time and they will put on weight for the journey south, i am feeding well over 50 of them at this time and have noticed an increase in migrant, but yes the get fat before there trip