I recognized a unique call and stopped to take pictures of this female yellow-rumped warbler. Of course I identified her afterward, but at least I knew enough to stop and take notice of the call! :)
Also in October I got Steve to go with me to check out Borderland State Park. We used the entrance off Bay Rd. in Easton, I believe. Since moving to Bridgewater I had wanted to go birding there, and although we didn't see any lifers, I still had some nice lighting for these shots of this mallard pair:
I also saw some ducks sitting out on the "sand bar" although not really a sand bar, but are of low water in the middle of the pond. I noticed the blue bars and thought it was something interesting, but then went back and consulted my Sibley Guide and realized it was most likely a juvenile mallard duck.
UPDATE: Thanks to Hap in Minnesota for sharing his insights- he thinks the duck on the right is a Black Duck, and based on these Google Image Results I agree. Thanks for teaching me something new!