Join our lively group of nature enthusiasts for programs presented by top birding and nature personalities in the Rio Grande Valley of South Texas. Field trips to out-of-the-ordinary birding spots, many to private lands not usually accessible by the public, and a quarterly newsletter are other benefits of membership. Members and the general public are invited to meetings on the 2nd Thursday of the month, September to May, 6:00 P.M., in the Harlingen Public Library, 410 76 Drive, Harlingen, TX.

Saturday, November 11, 2017

ACAS at the RGVBF - Photo Contest Booth


First Place         Anna Manuel's Mom and Baby McCall's Eastern Screech Owls  #5
Second Place    Nola Deffenbaugh's Nesting Buff-bellied Hummingbird  #7
Third Place        Paul Love's Courting Great Kiskadees  #14

Anna wins a Brome Bird Care Seed Saver 200, Nola wins a Brome Peanut Feeder and Paul a one year extension on his Arroyo Colorado Audubon membership.

Congratulations to our winners and all our photographers. The voting was very close with only 5 votes separating the top three.

Our booth at the RGVBF is a popular one as there are beautiful photos to look at and chose from.
At $1 a vote or 6 for $5 you can help the photographer win the most votes and a Brome Bird Feeder.
Voters also get entered into a drawing for a Brome Bird Feeder.  Votes will be counted at 3:00 pm Sunday November 12 following the voter drawing.  The winning photo will be posted here and on the Facebook page for both ACAS and RGVBF.

Sunday, January 22, 2017

October 12, 2017 Speaker Social

     Thursday, October 12, 2017 6:00 pm Speaker - Erik Breeden - Birding in China
                      Harlingen Public Library: 410 76 Dr. Harlingen, TX  78550

Join us as Erik shares his recent birding adventure in China.  You don't often hear about birds in China so this should be a real eye opener.  

October 14, 2017 Field Trip - Inn at Chachalaca Bend

The subject of our field trip to see birds is Habitat Birding.  This location has very diverse habitat in a small area.  The beauty of the grounds and abundant bird life make this a don't miss trip.  Photo is from the ACAS Big Sit on the Resaca at the Inn at Chachalaca Bend.

Friday, September 23, 2016

ACAS Pelagic Trip- September 17, 2016

Sunrise from the Osprey 
Last Saturday several members of ACAS attended the Texas Pelagics trip. Most arrived by 5 a.m. and our boat, the Osprey, departed at 5:30 a.m. We experienced southerly winds as we traveled east toward the edge of the continental shelf. This made for a rocky boat. A view of the full moon provided a distraction for the many first-time pelagic participants. Shortly after the sun rose we were quickly rewarded with a flyby of a Parasitic Jaeger!

Parasitic Jaeger

After seeing the jaeger, it was a couple of hours before we saw more birds, but the view of the open ocean provided great stimulation.

Flying Fish

I wasn't sure what this was when I first saw it from a distance, but Huck Hutchens kindly let me know what I was seeing- a Flying Fish!

Cory's Shearwater (Scopoli's spp.)
It was a pleasure to see a Cory's Shearwater (Scopoli's spp.) halfway through the trip. For many of us this was a lifer. They are much larger than the Audubon's Shearwater as you may note in the photo below.

Cory's Shearwater (Scopoli's spp.) (left) & Audubon's Shearwater (right)
We even saw a few landbirds flying over the Gulf of Mexico- Barn Swallow, Baltimore Oriole and Purple Martin.
At the end of our trip the list of birds seen included: Parasitic Jaeger, Cory's Shearwater, Audubon's Shearwater, Bridled Tern, Common Tern, Sooty Tern, Sandwich Tern, Laughing Gull, Royal Tern, Least Tern and Black Tern.

Sandwich Tern
After 12 hours on the water, land was a welcome sight. We had a successful trip with 5 true seabirds seen. Thank you to Gary Hodne for organizing this trip. If interested in Pelagic Trips be sure to visit

South Padre Island, TX

Monday, July 4, 2016

Fourth of July Guinea Grass Pull

Thank you to all our volunteers who made it out to Hugh Ramsey Nature Park to pull guinea grass this morning! Our Fourth of July Guinea Grass Pull was a great success! We pulled out a total of 7 wheelbarrows of guinea grass- all in a matter of two hours. Afterward, we enjoyed some nice cold watermelon Norma brought to treat us!

There is much that can be accomplished in a short amount of time when volunteers come forward and work as a team. The area behind the HUGH RAMSEY NATURE PARK sign will now be easier on the eyes!