The Spotted Sandpiper (Actitis macularia) only has spots during breeding season. Otherwise it is unspotted, which is how I often see it. The female and male look similar, except the female is slightly larger and has bigger spots when they show them.

Both adults and babies bob when they walk. From a video that I used to have but couldn't find, it showed an excited or nervous Spotted Sandpiper bobbing less and less as it calmed down. The bird is hardwired for bobbing, but the frequency is probably affected by a number of factors, including the presence of rivals or predators and the characteristics of their foraging areas such as sticky mud or packed sand.

Birds need clean and safe environments to thrive.
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VIDEO CONTENT
0:00 TITLE SLIDE
0:22 They walk along the edges of bodies of water.
0:45 It could be a polluted creek.
0:58 It could be a river.
1:12 It could even be the ocean.
1:26 Females fight for territories and mates.
2:05 Both adults and babies bob when they walk.
2:29 References
3:03 END SLIDE

#SpottedSandpiper