Phil Ngo

@squamate.bsky.social

Field herping in SoCal since Sept 2024 😆. Occasionally posting about science, ecology, conservation, and the natural world when I encounter something new and interesting. Photos and thoughts are my own. Creatures stay in the wild.

A baby sidewinder's tracks tell the story of the last few minutes. First, an elegant change in direction and in sidewinding handedness, like the jibe of a sailboat. Then a startled squiggle as it realizes it's being followed. Mojave Desert Sidewinder - Crotalus cerastes cerastes #herps

The elegant track of a baby sidewinder zigs and zags up a sand dune. The sidewinder is visible at the end of the track at the top.

Banded Rock Lizard - Petrosaurus mearnsi Making it look easy. This lizard was found in the peninsular ranges of Southern California. Geologically and ecologically, these ranges can be thought of as the northernmost part of Baja California. #herps

A closeup of a slender lizard with a distinct black collar and gray banding under an overhanging granite rock. The rock is a yellowish granite.

The western fence lizard hatchlings are out! First thing on the agenda? Eat some bugs! This one found a line of ants crawling on the branch of our palo verde and was happily snapping them up. Keep an eye out for little lizards! Western Fence Lizard - Sceloporus occidentalis July 2025 #herps 🦎 🐜

A hatchling western fence lizard hunts on the branch of a palo verde. The branches, not just the leaves, of the palo verde are green, and that is the overwhelming tint of this photo. The fence lizard is no more than 2 cm snout-to-vent.

Nearly every riparian canyon near my home in Southern California has some of these these pretty chorus frogs (aka treefrogs), often sympatric with their cousins, the Pacific chorus frog, which have a much wider range. California chorus frog - Pseudacris californiae May 2025 #herps

A light-colored california tree frog, with its characteristic mottled stony appearance, peers into the camera from its vantage point on a nearby granite rock.

Here’s a special toad. The Arroyo toad is a federally listed endangered species. Do yourself a favor and listen to its mating call. It’s both beautiful and eerie, a reminder of a sound far more common in the not-so-distant past. Arroyo toad - Anaxyrus californicus #herps #FrogFriday

A small toad is seen centered on a sandy substrate. This toad has a white base color with yellow and dark gray splotches. We’re looking at the toad at a slight angle from the head on.

The mojave rattlesnake has strikingly large scales on the top of its head - an identifying feature. For some reason it has an undeserved reputation for being particularly fearsome. I wouldn’t pet it, but like all rattlesnakes, it just wants to be left alone. #herps 🐍

A small mojave rattlesnake with muted olive gray coloration and a dorsal pattern with ovals of darker scales surrounded by white. The rattlesnake is pictured from top down coiled in ambush position on yellowish sands.

Unbothered by hikers and hitchhikers, this juvenile rattlesnake basked peacefully by the side of a busy trail. Contrary to popular belief, baby rattlesnakes have full control of their venom delivery and deliver less venom than adults. Southern pacific rattlesnake - Crotalus helleri #herps

A close-up view of the head and neck of a light tan and brown juvenile southern pacific rattlesnake, viewed from the side. The rattlesnake is on a sandy trail with sparse green vegetation - a bit of grass and clover. Most notably, a hitchhiker seed is nestled up against the neck of the snake. It does not look comfortable, but it does not seem bothered.

The LA Zoo has a great reptile house with a whole room dedicated to local reptiles. Last weekend I took my kids to the zoo to see it (again). Then, an hour later and a mile or two away, we went and found one of these local species in Griffith Park, fulfilling a long time fancy of mine. 🐍 🐍 🐍

A placard at the  LA Zoo showing an english and spanish translation of a description of the Southern Pacific Rattlesnake which reads:

Southern Pacific Rattlesnake
Cascabel del Pacifico Sur

Crotalus oreganus helleri

Meet Your Neighbor
This rattler is a California native.
In fact, it's the only rattlesnake found here in Griffith Park.
Sometimes it's even seen on
Zoo grounds!

Te Presento a Tu Vecina
Esta cascabel es oriunda de California.
De hecho, es la única serpiente de cascabel que habita en Griffith Park.
A veces se las ve hasta por los terrenos del zoológico!

The placard also has a range map showing its local distribution in Southern California and Baja California.A small Southern Pacific Rattlesnake, Crotalus helleri, in situ (as found) in habitat with woody debris and fresh newly grown green leaves and stalks of plants nearby. The habitat is shaded and the light is from a cloudy overcast sky.

Most people in the US live within the range of the Ring-necked Snake. It’s harmless, but tries its best to appear otherwise. The result is beauty. Ring-necked Snake - Diadophis punctatus 🐍

A close up shot of the bright orange-red ventral scales on the tail of a ring-necked snake, which is curled into a tight double loop. The tip of the tail, visible in the middle of the loop, is black, as are the edges of the surrounding dorsal scales, giving the red tail colors an almost gear-toothed look. The tail rests on a roughly textured, darkly colored rock.

Who can blame this horned lizard for frowning when its favorite native ants are being replaced by highly invasive argentine ants? They just aren’t as tasty. Coast Horned Lizard - Phrynosoma blainvillii #herps

A close-up profile of the head of Coast Horned Lizard. The lizard is spiked on its mouth, neck, shoulder, and back, with loosely folded rough brown scales, a permanent frown, and a particularly prominent crown of spikes on the back of its head. Background is a soft green with out of focus grass.

Take a few moments to stare into the soul of this frog. Imagine yourself surrounded by the deafening calls of dozens of other frogs, each fighting for survival in a fragment of untouched habitat in the Santa Monica Mountains. Pacific Chorus Frog - Pseudacris regilla Happy #FrogFriday. 🐸

A closeup image of a brown and tan pacific chorus frog sitting on a rock at night with a black background. The image centers on the eye of the frog, which is reddish brownish with golden flecks and a black horizontal oval pupil. The image has a strong bokeh, with all but the eye and face of the frog blurred. The frog is light tan colored underneath and, like all pacific chorus frogs, has a dark stripe across its eye starting at its nose and going back to its shoulder.

Here is a little legless lizard from LA County. People often ask, how come it’s a lizard and not a snake? It really comes down to genetics, but there are some big hints in its morphology: eyelids that blink, a tail that can detach. Southern California Legless Lizard - Anniella stebbinsi #herps 🦎

A golden, worm-sized, snake-like, limbless lizard rests on an outstretched palm, with a little of the sandy substrate and a few bits of dead leaves beneath the lizard. The lizard has a very thin black line down the center of its back and its body is curved in a s-shape.

Red Diamond Rattlesnakes are a CA Species of Special Concern due to habitat loss, fragmentation, and other pressures. They like using the same spaces we do. They also bask out in the open, like this one I saw last week, making them easy targets. Red Diamond Rattlesnake - Crotalus ruber #herps

A large red diamond rattlesnake basks on a sunny day in the ruins of an old structure, surrounded by concrete blocks embedded in dirt and lush green but invasive grasses. Its body winds gracefully through its surroundings, crossing itself once. The snake is a rusty tan with faint white diamonds along its back and a black and white striped tail leading to a rattle with 8 or 9 segments.

It is uniquely awe-inspiring to witness simple acts of living in the wild, such as this slender salamander I observed recently munching on springtails in the San Gabriel Mts near LA. ♥️🌎 Black-bellied Slender Salander (Batrachoseps nigriventris) Springtail sp., likely Ptenothrix maculosa #herps

I lived in SoCal for years before I learned we have these adorable little newts in the area. Up north they are especially toxic, locked in an evolutionary arms race with garter snakes that have enough resistance to their tetrodotoxin to prey upon them. California newt - Taricha torosa #herps

A Californa newt with reddish-brown dorsal coloring and orange ventrum climbs up a rock. The newt has a rough bumpy texture. The newt is shown in profile. In the blurred background are grasses, sticks, and rocks.

I have seen a lot of Pacific chorus frogs and the range of colors and patterns they have never ceases to amaze. The deep bronze on this one is particularly striking. The jaws of dead Western velvety tree ant are locked on its lip. I wonder how long it will stay there. #herps 🐸 🐜 #frogfriday

A small pacific chorus frog with deeply reddish-bronze color sits on a green leaf. We’re looking at the frog head on. The corpse of a western velvety tree ant, which is mostly light reddish brown with a dark brown velvety abdomen, has jaws locked on the upper right lip of the frog. If the frog were the size of a person, the ant would probably be the size of a banana.