If you’ve spent any real time in Panama, whether deep in the jungle, lounging on a Caribbean beach, or even just hanging around a humid backyard, you’ve probably heard whispers about them. Not mosquitoes. Not ticks. Something worse, smaller, quieter, and often more irritating: sandflies. Known locally as chitras or jejenes, these nearly invisible insects are one of the most misunderstood (and underestimated) parts of life in the tropics. This is your complete, no-BS, deeply detailed guide to understanding them, and more importantly, beating them.

What Are Sandflies (Really)?

Sandflies in Panama are tiny biting insects from the phlebotomine group. They’re so small, often less than 2–3 mm, that you usually won’t see them at all. Many people describe them as “no-see-ums,” which is pretty accurate.

They are not flies in the typical sense and behave very differently from mosquitoes. Unlike the whining buzz of a mosquito, sandflies are silent hunters. You don’t hear them coming. You don’t feel them land. You only realize they were there once the itching begins.

They breed in moist, organic environments think:

Mangroves

Riverbanks

Jungle leaf litter

Wet soil and decaying vegetation

This is why they thrive in exactly the places travelers love most: beaches, rainforests, waterfalls, and eco-lodges.

Where Are Sandflies Found in Panama?

Short answer: almost everywhere but not equally.

They are most common in:

Caribbean coast (Bocas del Toro, Colón)

Jungle regions (Darién, Chiriquí Highlands forests)

Mangrove-heavy coastlines

Rural and forest-edge communities

They are less common in dense urban areas, but can still appear in gardens or near water.

Interestingly, multiple species occupy different vertical zones, some at ground level, others in the forest canopy, meaning you can get bitten whether you’re sitting on a beach log or hiking under dense jungle cover.

When Are They Most Active?

This is where things get tricky, and why people get caught off guard.

Most sandflies in Panama are:

Crepuscular (dawn and dusk)

Nocturnal (night)

But some species bite during the day too.

They are worst during the rainy season, when humidity and breeding sites explode.

Peak danger times:

Sunrise

Sunset

Still, windless evenings

After rain

Wind is your friend. Sandflies are weak fliers, if there’s even a light breeze, their activity drops dramatically.

What Do Sandfly Bites Feel Like?

This is where sandflies earn their reputation.

The bite itself is usually unnoticed. But hours later:

Small red bumps appear

Intense itching begins

Clusters form (especially on ankles, legs, waistline)

They love biting feet and ankles, especially on beaches.

The itch can be:

Worse than mosquito bites

Long-lasting (days to a week)

Intensified by scratching

Some people barely react. Others get extreme allergic responses with swelling and dozens (or hundreds) of bites.

Health Risks: Should You Be Worried?

For most travelers, sandflies are just an itchy nuisance. But they can carry something more serious: Leishmaniasis.

Leishmaniasis in Panama

Spread through sandfly bites

Causes skin sores that can appear weeks or months later

Occurs mostly in rural and jungle regions

Symptoms:

Persistent skin ulcers

Swollen lymph nodes

In rare cases, mucosal damage (nose/mouth)

Important: risk for typical travelers is low, especially outside remote jungle areas. But it’s real, and worth knowing about.

Why Sandflies Are So Hard to Avoid

They beat people because:

They are tiny and pass through standard mosquito nets

Silent and no warning

Fast feeders and bite and vanish

Low flight and target ankles and legs

Persistent and one area can have thousands

Even worse: some repellents and clothing strategies that work for mosquitoes don’t work as well here.

The Ultimate Prevention Strategy (What Actually Works)

Let’s cut through myths and focus on proven methods.

1. Use the Right Repellent (Critical)

The gold standard is:

DEET (20%+) → extremely effective protection

Other decent options:

Picaridin

Oil of lemon eucalyptus

But here’s the key:
Apply to ALL exposed skin, not just arms

Sandflies will go for:

Ankles

Behind knees

Waistline

Neck

Miss a spot and they find it.

2. Cover Your Feet (Massively Underrated)

This alone can reduce bites dramatically.

Wear:

Socks

Closed shoes

Especially at beaches or dusk. Sandflies LOVE bare feet.

3. Timing Is Everything

Avoid sitting still:

At sunset on the beach

In jungle clearings at dusk

Near stagnant water at night

If you must be outside:

Stay in motion

Choose breezy areas

4. Clothing Strategy

Long pants (lightweight, breathable)

Loose-fitting clothing

Light colors (less attractive to insects)

Permethrin-treated clothing helps but is not enough alone. You still need repellent on skin.

5. Control Your Environment

At accommodation:

Use fans (huge impact)

Choose screened or air-conditioned rooms

Avoid staying right next to mangroves or swampy ground

Sandflies are weak fliers, airflow destroys their ability to land.

6. Use Bed Nets (But Upgrade Them)

Standard mosquito nets may fail.

Better:

Fine-mesh nets

Tightly sealed edges

Combine with repellent

7. Natural & “Local” Tricks (Mixed Results)

You’ll hear:

Coconut oil

Baby oil

Smoke

These may help slightly but none are as reliable as proper repellent.

What To Do If You Get Bitten

First rule: don’t scratch (easier said than done).

Why?

Scratching and infection risk

Makes itching last longer

Better options:

Antihistamines

Hydrocortisone cream

Cold compress

Calamine lotion

Most bites:

Peak in itchiness within 1–2 days

Fade within a week

If a sore:

Grows

Doesn’t heal

Turns into an ulcer

See a doctor!

The Psychology of Sandflies: Why They Feel Worse Than They Are

One of the most interesting things about sandflies isn’t just the bite, it’s how they affect your mindset. Because you don’t see or hear them, your brain fills in the gaps. A few bites can feel like an attack. Travelers often report that sandflies seem “relentless” or “everywhere,” even when they’re only active in very specific conditions.

This creates a kind of tropical paranoia, people start swatting at nothing, checking their legs constantly, or avoiding beaches at sunset altogether. In reality, sandflies are highly predictable. Once you understand their timing and habitat, that anxiety drops off quickly. Knowledge is not just power here, it’s peace of mind.

Why Some People Get Destroyed (and Others Don’t)

Ever notice how one person ends up covered in bites while another walks away untouched? It’s not random.

Factors that influence attraction:

Body heat

Carbon dioxide output

Skin bacteria

Sweat composition

Even genetics

Some people are simply more “visible” to biting insects. If you’re one of them, you’ll need to be extra disciplined with repellent and clothing. The upside? Once you dial in your routine, you can still avoid most bites, it just takes consistency.

The Backpacker Reality: Lessons Learned the Hard Way

Talk to long-term travelers in Panama and you’ll hear the same stories. The worst bites almost always happen:

The first few days in the country

During a relaxed sunset with no repellent

After swimming, when repellent has washed off

When barefoot on the beach

After that first “initiation,” habits change fast. Shoes go on. Repellent becomes routine. People start chasing breezes and avoiding still air. And just like that, sandflies go from a nightmare to a manageable annoyance.

The Reality: Are Sandflies a Dealbreaker?

Not even close.

Yes, they’re annoying.
Yes, they can ruin a sunset if you’re unprepared.

But with basic precautions:

Repellent

Covered feet

Smart timing

They go from “trip-ruining nightmare” to “minor inconvenience.”

Most long-term travelers in Panama simply adapt, and after a while, you’ll instinctively know when and where they’ll show up.

Sandflies are the ultimate ambush predator of the tropics, tiny, silent, and persistent. But they’re also predictable once you understand them. Respect their habitat, protect your skin properly, and adjust your timing, and you’ll stay one step ahead.

Or put simply:

Mosquitoes are obvious.
Sandflies are sneaky.
Preparation is everything.