I have to give this little Northern Waterthrush some credit for helping me find the Prothonotary Warbler I posted last week. I was tracking this warbler as it flew from rock to rock in the creek when it darted to the bank and flushed out the Prothonotary Warbler from where it had been resting under the lip of the bank. As soon as it flew into the cover along the bank, the bright yellow of the Prothonotary flashed.