Here is the sandpiper, Lanen.
http://i403.photobucket.com/albums/pp119/Jen_P/ERCSandpiper.jpgAs you can see, he's kind of a troodon sandpiper. Basically, this guy was once a flying bird. It had stubby fingers on its wings that it used for foraging, and eventually foraging (digging, scratching, catching, holding) became the main usage of the wing, rather than flying. The wings filled a more and more arm-like role but as a result became less and less suitable for flying. Finally the sandpiper lost its ability to fly altogether, and thereafter it began rapidly changing its now-useless wings into true arms that it held in front of its body. At the same time, the melded bones of the wing began to split out into individual fingers. Furthermore, to balance the extra weight of having its arms out front instead of tucked to the sides, its tail lengthened and grew heavier. The sandpiper is still not ideally suited to its new life as its arms have yet to fully develop, but it seems to be doing quite well for itself in the meantime.
The tall head crest was used as a resonance chamber for creating loud noises, as they were probably used for in the hadrosaurs. The crest also increased the sandpiper's height, allowing it to look slightly more intimidating to predators.
So, do you think this guy nested somewhere around the swamp...?