Shorebirds southbound

I just started take captures with the 884 of some southbound shorebirds including this Semipalmated Sandpiper along with a Greater Yellowlegs still in breeding plumage,
I hope the breeding grounds were not affected by the the unseasonable cold to much for the Breeders . I think when we start seeing the younger Birds in a about a month we can access a tally count and see if there was any impact.