Situated just a couple hundred miles south of Texas in the Mexican
state of Tamaulipas is La Pesca, a wonderful location with tropical
foothill thornforest, saltwater lagoons, freshwater marshes, desolate
barrier island beaches, and woodlots that can be the site of amazing
fallout events when weather conditions are favorable. The goal of
this private tour was to find species that are often hard to locate
within Mexican borders, like Clapper Rail, Buff-breasted Sandpiper, and
Tawny-collared Nightjar. Thankfully for us, our trip coincided with the
biggest cold front of the entire spring, which turned this sleepy
coastal town into migration central.
Day 1:
We started the tour early this morning in Harlingen, from where we
drove south to cross the border into Mexico. The cold front had just
passed here, so we hurried our way south. Along the way, a
Greater Roadrunner and a flock of Scaled Quail dashed across the road.
Just north of Soto La Marina, we literally drove into two flocks of
hundreds of migrating
Mississippi
Kites. They were traveling against the strong north wind
barely above the thornscrub, and at the time, just over the road.
Needless to say, we had amazing views of these elegant birds.
After we checked into our hotel, we quickly headed out to look for
migrants. An
Eastern Phoebe
in the hotel parking lot was quite a surprise on this late date.
We’d only made it a few hundred yards when a flock of shorebirds
appeared from the south, heading directly for us. They finally
materialized into a couple dozen
Upland
Sandpipers, one of our targets! Nearer the beach, a small
flooded area next to the road was full of shorebirds, including
Wilson’s and
Snowy Plovers and all five peeps.
White-rumped and
Baird’s, being targets, were
especially welcome sights. Across the road, a male Pyrrhuloxia
and an Altamira Oriole sat up on a fenceline while a small flock of
Tamaulipas Crows (the first of many)
croaked from the tops of telephone poles overhead. We then drove north
along the beach itself, where we found large numbers of terns and
“beach shorebirds” huddled together in an attempt to get out of the
strong north wind. Undulating flocks of Franklin’s Gulls were
blown closer to land, their blushing pink breasts providing a beautiful
contrast to the churning, blue-gray Gulf behind them. Suddenly, we
spotted a shorebird over the water struggling to reach the shore.
As it approached, it gained altitude, and we could see its white wing
linings. It was a Buff-breasted Sandpiper—another target!
We had a nice look as it flew directly over us, but unfortunately, it
didn’t stop.
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Least Tern
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Baird's Sandpiper
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Amazed at our luck with shorebirds, we decided to head to a shrubby
woodlot to look for passerines. On the way back along the beach,
a number of flycatchers were perched on a barbed wire fence. We found
Eastern Wood-Pewee, Scissor-tailed Flycatcher, and Eastern, Western,
and Couch’s Kingbirds. Before we got out of a car at the woodlot, a
large flock of Tennessee Warblers flew in front of us. There
wasn’t much mixed in with them, but they led us across the road, where
we heard an empid “peeping”. It sure sounded like an
Alder Flycatcher, and eventually we
had a very nice look at it, confirming our suspicions.
Deeper into the woodlot, we found literally hundreds of birds pushed
down by the relentless north wind. Yellow Warblers were
everywhere, but mixed in with them we found
Philadelphia Vireo, Chestnut-sided
Warbler, Blue Grosbeak, and Painted Bunting among many others.
Within a small flock of Red-eyed Vireos we noticed a slightly duller
bird. Finally it turned its head and we could see a larger bill
and a teardrop-shaped black smudge on the malar: it was a
Black-whiskered Vireo, a Caribbean
vagrant! We also found some interesting resident birds, like
White-bellied Wren,
Gray-crowned Yellowthroat, and
White-collared Seedeater. We figured we’d be lucky just to see a
cuckoo, so we were floored when we had amazing studies of no fewer than
three
Black-billed Cuckoos.
Finally, on our way back to the car, we noticed a chunky warbler pop up
off the ground into a low bush. It stayed well-concealed for a
good while before turning its head. We noticed a complete white
eye ring, gray throat, and dark slaty bib. We’d found another
vagrant: a
Connecticut Warbler!
It was starting to get dark by now, so we headed back into town for
supper.
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Painted Buntings
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Gray-crowned Yellowthroat
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After a nice meal of local seafood, we headed up into the
thornforest-covered foothills to look for night birds. The
endemic
Tawny-collared Nightjar was definitely the biggest
target of our efforts, and we found a few without much effort,
including nice views of one perched on a fencepost right next to the
road after it flew directly over our heads! We also noted Common
Pauraque and
Eastern Screech-Owl,
the latter at the southern end of its range.
Day
2: We hit the thornforest first thing
this morning, targeting Wild Turkey and
Yellow-headed Parrot. The
parrots were quite vocal, but seeing one proved to be quite a
challenge. It took a little while, but once it rained, it
poured. Multiple pairs of these massive birds provided some
memorable in-flight views of their glowing golden heads and
rainbow-patterned wings. Between sightings, we saw a migrating
flock of Wood Storks and heard the goggling of a couple distant
Wild Turkeys. All the while, we were
kept company by
Elegant Trogons,
Varied Buntings,
Long-billed Thrashers, Red-billed Pigeons, Olive Sparrows, and
Blue Buntings.
Lunch was calling back in La Pesca, but we stopped at a freshwater
marsh along the way, where we promptly found a Swamp Sparrow and a
small flock of
Mottled Ducks.
As I tried to pish the Swamp Sparrow back in for a closer look, a
Clapper Rail started calling
back. Wow—on our “hit list” but very unexpected! A little
playback brought him right out into the open, where he stood feet from
us, yelled back, and posed for a few photographs before running back
into the cattails. An immature Common Black-Hawk circled over
with a Broad-winged Hawk, and a family of Social Flycatchers conversed
in a nearby treetop. Just before we got back to the hotel, a
Blue-gray Tanager flew across the
road within town, extending its known range even further north towards
the US.
Still giddy over our luck from the day before, we decided to check the
“migrant trap” again after lunch. A large number of the migrants
had cleared out, but we were able to relocate the
Black-whiskered Vireo. There
were also some new migrants: a
Willow
Flycatcher, a
Blackburnian
Warbler, a Scarlet Tanager, a flyby Merlin, and a flock of a
couple hundred Dickcissels were the highlights. A small group of
diminutive
Yellow-faced Grassquits,
a Roadside Hawk, and a family of Groove-billed Anis rounded out the
residents.
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Clapper Rail
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Roadside Hawk
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Scarlet Tanager
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Blue-gray Tanager
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On the drive out to the beach, tens of thousands of birds were
streaming by to the north along the lagoon. Most were Wilson’s
Phalaropes and White-faced Ibis, but we also picked out a small group
of
Red Knots. A Northern
Bobwhite sang from a fencepost, and a Cassin’s Sparrow sang from a
nearby bush along the dunes. The latter (a desert species) was
quite interesting to see against a background of crashing ocean waves!
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Northern
Bobwhite
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lagoon
full of tens of thousands of Wilson's Phlalaropes
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At the mouth of the Río Soto La Marina, there was a large flock
of gulls and terns roosting on a sandbar, where we hoped to find
another target: Lesser Black-backed Gull. While we dipped on this
long-shot, we were not prepared for what we found instead: three
rare gull species! Unbelievably, we found one adult each of
Kelp,
Thayer’s, and
Glaucous Gulls! The distant
views were not totally satisfying, though, so we drove further up the
river for a closer look. An
American
Golden-Plover ran across the road in front of us as we drove
through the sand dunes and puddles. While we had closer views of
the gulls, an immature male
“Mangrove”
Warbler appeared on the barbed wire fence just feet from us.
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American Golden-Plover
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immature male "Mangrove" Warbler
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Day
3: We returned to the thornforest at first light and were
rewarded with a chorus of
Thicket
Tinamous, Plain Chachalacas,
Blue-crowned
Motmots, White-tipped Doves,
Ivory-billed
Woodcreepers, and Elegant Trogons. Always a welcome sight,
a
Lineated Woodpecker flew
over our heads just before we headed back to the US, having nearly
exhausted our list of possible targets.
In Matamoros, we noted some European Starlings, which are found in most
of Mexico only along the border. Even though we were back in the
US, we hadn’t given up on finding Mexican targets from the US side of
the river. On the way towards Boca Chica a bullet-fast
Aplomado Falcon buzzed the
car. We hit the beach and immediately drove south to the mouth of
the Rio Grande. The high tide had pushed up large numbers of gorgeous
terns into the sargassum on the shoreline; using the car as a blind, we
were able to again have marvelous views of them. Witnessing the
courtship antics of a pair of Sandwich Terns was particularly
memorable. Close to the mouth of the river, a
Piping Plover and a small flock of
American Avocets fed (frustratingly) on the US side. With some
patience and determination, we eventually saw the plover enter Mexican
airspace—another target down! Then it was inland along the river
to try to find Seaside Sparrows among the marshes and salt pans.
Unfortunately, recent rains made driving the salt pans a little risky,
so we gave up on what was a long shot anyway. As the sun set, we
enjoyed a flock of
Green Parakeets
and a pair of
Red-crowned Parrots
at Fort Brown in Brownsville.
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courting Sandwich Terns
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male American Avocet
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The cold front provided for better birding in La Pesca than we’d
imagined, and we ended the tour with over twice the number of targets
we’d realistically hoped for! This tour rivaled the best days
I’ve experienced on the Texas coast for sheer excitement and numbers of
birds. In just two and a half days of birding, we recorded 197
species! All in all, it was one of the most impressive migration
spectacles we’d ever witnessed.