Last two photos in the most recent series are of an adult, first ones are of a juvenile. And, you can't gauge the weight of a chick in a photo, the birds puff up and slick down their feathers so you can't really tell the condition of the bird ... so basically, don't fret yet.
If the bird looks rough or haggard - like s/he went through a blender backward and had tidied up but you can still tell a blender was involved - that's another story.
And since there is obviously still an adult in the area (the 7pm photos are evidence of that), the chick won't be starving ...
Help any?
