

Perhaps one of the most overlooked birding “hot-spots” in South Texas is the mouth of the Rio Grande at Boca Chica Beach. There is no infrastructure or visitor center located there. Because of this, and its primitive nature, it doesn’t appear in very many travel guides, like members of World Birding Centers and other popular destinations in South Texas. In some ways, I find this dynamic endearing.
Biologists understand that wherever saltwater and freshwater meet, life abounds. For numerous fish species, their lives, if not their reproductive success, depend on such places. Where fish congregate, fish-eating birds concentrate. On the west coast near the Mexico-USA border, the Tijuana River mouth provides nature lovers the opportunity to observe moments of predator-prey interactions, as does the Rio Grande on Mexico’s east coast equivalent.
Many visitors to Boca Chica Beach enjoy driving onto the beach with their vehicles, but only the foolhardy do so without four-wheel drive. Where the pavement of Boca Chica Boulevard ends 0.4 miles east of the Space-X Launch Complex, the early morning beach sand may look firm, and might even be cross-worthy, but after a few dozen vehicles pass over it, it can turn into a sand trap, and you might not get back to the pavement. Even a “Dukes of Hazzard” gun-it-and-run-it maneuver might leave you short of firm footing. Having no interest in an expensive tow bill when I visited, I parked at the paved roadside and rode my bicycle on the beach.
A mere 2.8 mile ride south from Boca Chica Boulevard brings us to the mouth of the Rio Grande. Folks from both sides of the border enjoy the river mouth. Fishing is the most common activity. In my experience, no one has more fun fishing than the families from south of the border. I must confess, watching a skilled net toss is a joy to watch. Fishing in this method is not a common practice in Southern California, but it is commonplace in South Texas. When I first saw fishermen wading into the shallow waters of the river-mouth, I feared that they might chase away the feeding birds. That didn’t seem to be the case during the times I spent here.
Twice I visited the river-mouth. First on 2021-01-30, and again on 2021-03-27. Two visits aren’t enough to understand the cycles of bird life here, but I think it’s safe to say that the players on this watery stage change with the seasons. If I were a full-time Brownsville resident, I would spend enough time here to speak more authoritatively on the subject. During my 2021 visit to Texas, I was on a mission to explore as many of the renown birding destinations as I could, so Boca Chica Beach didn’t get the attention that it deserves.
Sandwich Tern(Thalasseus sandvicensis) |
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Description: I wasn’t able to approach this mixed flock as closely as I’d have liked and had to settle for these distant images. A quick Saturday morning tour of Boca Chica Beach to look for Sandwich Terns yielded my first meetings with this species, plus a few others. I hope to do a better job of capturing their images if (or when) I meet them again. |
Date Taken: 2021:04:24 10:26 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: SandwichTern-TernFlock_D5X1069-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Ruddy Turnstone(Arenaria interpres) |
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Description: It seems every visit I’ve made to this beach, I meet Ruddy Turnstones and Sanderlings. A quick Saturday morning tour of Boca Chica Beach to look for Sandwich Terns yielded my first meetings with this species, plus a few others. I hope to do a better job of capturing their images if (or when) I meet them again. |
Date Taken: 2021:04:24 10:30 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: RuddyTurnstone_D5X1126-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Sanderling(Calidris alba) |
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Description: Sanderlings are always entertaining to watch as they perform their run-and-stop foraging on sandy beaches. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:16 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/16.0, 1/2000 |
File Name: Sanderling_D5X6911-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Snowy Egret(Egretta thula) |
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Description: Snowy and White-Morph Reddish Egrets have a similar appearance, unless seen side-by-side. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:28 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: SnowyEgret-WhiteMorph-Juvenile_D5X5654-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Tricolored Heron(Egretta tricolor) |
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Description: Down the hatch! This bird caught a small fry snack. Tricolored Herons joined the other wader species at the river mouth where the fishing was productive. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:33 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: TricoloredHeron_D5X5817-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Tricolored Heron(Egretta tricolor) |
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Description: Tricolored Herons joined the other wader species at the river mouth where the fishing was productive. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:32 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: TricoloredHeron_D5X5794-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Ruddy Turnstone(Arenaria interpres) |
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Description: I found Ruddy Turnstones and Sanderlings working the shores along the entire length of the beach at Boca Chica. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:13 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: RuddyTurnstone_D5X6861-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Double-Crested Cormorant(Phalacrocorax auritus) |
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Description: I watched as this cormorant caught a fish and then had to defend his prize from pirates. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:02 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: DoubleCrestedCormorant_D5X6511-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Caspian Tern(Hydroprogne caspia) |
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Description: Caspian Terns exploited the waters of the estuary during my visit. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:14 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/16.0, 1/2000 |
File Name: CaspianTern_D5X6897-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Caspian Tern(Hydroprogne caspia) |
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Description: Caspian Terns exploited the waters of the estuary during my visit. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:24 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/16.0, 1/2000 |
File Name: CaspianTern_D5X7060-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Double-Crested Cormorant(Phalacrocorax auritus) |
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Description: I watched as this cormorant caught a fish and then had to defend his prize from pirates. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:01 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: DoubleCrestedCormorant_D5X6466-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Brown Pelican(Pelecanus occidentalis) |
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Description: Brown Pelicans patrolled the coast and occasionally stopped at the river mouth to forage. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:58 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: BrownPelican_D5X6446-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
American Avocet(Recurvirostra americana) |
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Description: Avocets far outnumbered all other shorebirds on the river mouth. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here, the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:30 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/16.0, 1/2000 |
File Name: AmericanAvocet_D5X7146-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Brown Pelican(Pelecanus occidentalis) |
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Description: Brown Pelicans patrolled the coast and occasionally stopped at the river mouth to forage. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:51 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: BrownPelican_D5X6272-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
American Avocet(Recurvirostra americana) |
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Description: Avocets far outnumbered all other shorebirds on the river mouth. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here, the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:51 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: AmericanAvocet_D5X6288-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
American Avocet(Recurvirostra americana) |
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Description: Avocets far outnumbered all other shorebirds on the river mouth. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here, the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:37 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: AmericanAvocet_D5X5952-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
American Avocet(Recurvirostra americana) |
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Description: Avocets far outnumbered all other shorebirds on the river mouth. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here, the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:34 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: AmericanAvocet_D5X5895-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Brown Pelican(Pelecanus occidentalis) |
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Description: Gulls like this first year Ring-Billed, sometimes perch atop foraging pelicans, hoping to snag an escaped fish from the larger bird’s crop. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:34 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/2000 |
File Name: BrownPelican_D5X6328-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Ring-Billed Gull(Larus delawarensis) |
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Description: Gulls like this first year Ring-Billed, sometimes perch atop foraging pelicans, hoping to snag an escaped fish from the larger bird’s crop. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:34 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/2000 |
File Name: RingBilledGull_D5X6384-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Forster's Tern(Sterna forsteri) |
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Description: Forster’s Terns are buoyant flyers when foraging, and can be a challenge to capture their images as they prepare a plunge dive. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:22 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/2000 |
File Name: ForstersTern_D5X6156-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Brown Pelican(Pelecanus occidentalis) |
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Description: Brown Pelicans forage by plunge diving, sometimes from great height, and sometimes from only a few feet. Occasionally they will dip in a manner similar to White Pelicans. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:34 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/1000 |
File Name: BrownPelican_D5X6343-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Forster's Tern(Sterna forsteri) |
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Description: Forster’s Terns are buoyant flyers when foraging, and can be a challenge to capture their images as they prepare a plunge dive. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:13 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/2000 |
File Name: ForstersTern_D5X5944-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Bonaparte's Gull(Chroicocephalus philadelphia) |
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Description: The Bonaparte's Gulls I met here on the river mouth seemed to be juveniles. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:21 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/1000 |
File Name: BonapartesGull_D5X6076-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Bonaparte's Gull(Chroicocephalus philadelphia) |
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Description: The Bonaparte's Gulls I met here on the river mouth seemed to be juveniles. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:21 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/1000 |
File Name: BonapartesGull_D5X6111-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
American White Pelican(Pelecanus erythrorhynchos) |
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Description: White Pelicans foraged alongside the Brown Pelicans and the Avocets here on the river mouth. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:10 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/1000 |
File Name: AmericanWhitePelican_D5X5895-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
American Avocet(Recurvirostra americana) |
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Description: Frantic foragers. Avocets were the most numerous birds on the river mouth. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:26 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/1000 |
File Name: AmericanAvocet_D5X6239-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
American Avocet(Recurvirostra americana) |
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Description: Avocets were the most numerous birds on the river mouth. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:11 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/1000 |
File Name: AmericanAvocet_D5X5899-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Brown Pelican(Pelecanus occidentalis) |
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Description: Brown Pelicans forage by plunge diving, sometimes from great height, and sometimes from only a few feet. Occasionally they will dip in a manner similar to White Pelicans. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:22 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/2000 |
File Name: BrownPelican_D5X6165-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Snowy Egret(Egretta thula) |
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Description: Snowy Egrets joined the crew of shorebirds, pelicans and gulls at the mouth of the Rio Grande. I rode my bike to the southern end of Boca Chica Beach and enjoyed meeting the foraging birds at the mouth of the Rio Grande. This is the east-most border of Texas and Mexico. |
Date Taken: 2021:01:30 8:23 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/11.0, 1/2000 |
File Name: SnowyEgret_D5X6178-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Double-Crested Cormorant(Phalacrocorax auritus) |
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Description: I watched as this cormorant caught a fish and then had to defend his prize from pirates. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 10:02 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: DoubleCrestedCormorant_D5X6487-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Laughing Gull(Leucophaeus atricilla) |
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Description: Laughing and Ring-Billed Gulls were the only members of their clan I saw at the river mouth this day. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:50 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: LaughingGull_D5X6162-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
Forster's Tern(Sterna forsteri) |
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Description: I enjoyed watching immature and adult Forster’s Terns making nearby splash-dives. I loaded my gear on my bike and rode out on Boca Chica Beach to the mouth of the Rio Grande, where the fresh water meets the Gulf of Mexico. Here the chances to meet and observe the dynamic interaction of species are high. |
Date Taken: 2021:03:27 9:50 |
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Location:
Boca Chica Beach |
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Camera Information: NIKON D5, 800 mm, f/8.0, 1/8000 |
File Name: ForstersTern_D5X6184-BocaChicaBeach |
| © 2021 Jack Daynes, shadeTreeImaging.com |
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