After J. D. Cortez told me about tons of birds on the flats at Boca Chica Unit of the Lower Rio Grande Valley NWR, I decided to drive down there and check it out. On the way I had a singing Botteri's Sparrow on Hwy 4 across from the Palmito Ranch. The turnoff for the Boca Chica Unit is about four miles before the beach with the road just being a sandy track that follows the Rio Grande.
Some large Black Mangroves along the river exceeded ten feet in height and held some buckeye butterflies that I think may be Mangrove Buckeye.
An unexpected find was six Seaside Sparrows. This is about as far south as they nest. I was hoping one would fly 50 yards across the river so I could add it to my Mexico list.
Another surprise was a Kentucky Warbler skulking in the mangroves.
The mudflats back to the north were covered with thousands of egrets and shorebirds. I scoped over them for a while but found nothing unusual.
After a couple of hours along the river I drove over to the beach and checked out the river mouth. Plenty of terns about including this Common.
This Keeled Earless Lizard was quite camouflaged against the sand.
Every time I get down here I like to check on the two Red Mangroves that grow along a little tidal creek. Though they had suffered a bit of frost damage last winter they were doing well and even producing fruit.
Living on the river on the other side.