Adult male golden-cheeked warbler singing on a branch in oak-juniper woodland.
© Elizabeth Hingle

Central Texas · Edwards Plateau

Golden-cheeked warbler surveys

Surveys can only be conducted between March 15 and June 1, and only by a biologist holding a federal recovery permit. I hold that permit.

Authority
USFWSESA §10(a)(1)(A) recovery permit
Permit No.
ESPER32178096-0Austin Ecological Services Field Office
Authorises
Surveyspresence/absence and habitat assessments
Valid
2026–2031statewide, Texas

Why this matters for your project

The exposure is the same whether or not you looked

The golden-cheeked warbler is federally listed as endangered and nests only in Central Texas — nowhere else on earth. It breeds in mature Ashe juniper mixed with oaks and other hardwoods, typically on slopes and in canyons with substantial canopy cover.

Under the Endangered Species Act, “take” includes habitat modification that kills or injures listed wildlife by significantly disrupting breeding, feeding or sheltering. Clearing occupied habitat without knowing it is occupied does not avoid that exposure — it only means the exposure is undocumented.

Some Central Texas counties have regional conservation plans offering an alternative compliance path with a per-acre fee. Many do not. Which situation your property is in depends on the county and the project, and it is worth knowing before you plan a clearing schedule.

Still from a field video walking through oak-juniper woodland in Central Texas.

Video slot — field explainer, Central Texas, April 2026

From the field

What this actually looks like on the ground

Rather than describe it, here is the habitat itself — the oak-juniper woodland the warbler depends on, and what a surveyor is looking at when deciding whether a property needs a full survey or a habitat assessment.

Short answers to the questions that come up most: whether you need a survey if you are not removing trees, what the window means for your schedule, what happens when the weather turns, and what to do if you miss it.

MOCKUP NOTE — a YouTube embed goes here on the live site. Full-quality files are in 02 Web-ready.

The survey window

March 15 to June 1. There is no other window.

Miss it and the answer waits a full year. Because each site needs five spaced visits inside eleven weeks, spring capacity is limited and typically committed by February.

123 45 MAR 15 MAY 15 JUN 1 Window opens 60% of visits done by here Window closes Minimum 5 visits per site · no two within any 5-day period
Required survey visit Front-loaded half of the season Open window
Effort
1 hr / 25 acper visit, one-hour floor
Time of day
Dawn + 7 hrsfrom 30 min before sunrise
Weather limits
45–80°Fno wind over 12 mph, fog or rain
To infer absence
3 yearsof negative surveys, in most cases

Not sure you need a survey?

A habitat assessment is often the right first step

Not every property with junipers is warbler habitat. Stands under 15 feet, pure juniper with no hardwoods, and open woodland below about 35 percent canopy cover generally are not.

A habitat assessment evaluates the vegetation on your property against the Service's habitat criteria and produces a documented report — and unlike a survey, it is not restricted to the spring window.

If a property meeting the habitat description is not surveyed, that assessment report goes to the USFWS Austin field office for review. Note that the Service does not issue concurrence on habitat assessments; the report documents the basis for the determination and the record of its submission.

Ask about a habitat assessment →

Video slot. This is where your habitat explainer belongs — you, in juniper-oak woodland, answering “do I need a survey?” in about three minutes. It is the single most persuasive asset on the page.
A golden-cheeked warbler nest tucked into the interior branches of a mature Ashe juniper.
A nest in mature Ashe juniper — the structure the habitat criteria describe · © Elizabeth Hingle

Experience with this species

Seven seasons before the permit

Fort Cavazos

Seasonal golden-cheeked warbler biologist. Territory mapping, point counts, target-netting, banding, nest searching and nest monitoring — conducted under the program's permit.

Austin Water · Wildland Conservation

Five seasons of golden-cheeked warbler resighting on the Balcones Canyonlands Preserve.

Kickapoo Cavern State Park

Black-capped vireo surveys, with point counts for golden-cheeked warbler and other sensitive avian species.

Start small

You do not have to commit to a survey to get an answer

Most people who call me do not need a full protocol survey. They need to know whether they need one. These are three separate products, in increasing order of cost and commitment — and many projects stop at the first.

Step 01 — Desk

Desktop / GIS habitat screening

Before anyone walks the property. I review current and historical aerial imagery, canopy cover, slope and drainage, county habitat mapping and the Service's range data against the published habitat criteria, and tell you what I see.

No site visit. No season. Often it is enough to tell you whether this is a real problem — and if it is not, you have saved everything downstream.

You receive

  • A written screening memo
  • Annotated aerial imagery
  • A clear recommendation on next steps

Request a quote →

Step 02 — Ground

Field habitat assessment

If the desktop review is inconclusive, or a reviewing agency wants documentation, I walk the property and assess the vegetation against the habitat criteria — juniper maturity, hardwood mix, canopy cover, topography — and produce a documented report.

Not restricted to the spring window. If a property meets the habitat description and is not surveyed, this report goes to the USFWS Austin field office. The Service does not issue concurrence; the report documents the basis for the determination.

You receive

  • A site visit by a permitted biologist
  • The full report the Service requires
  • Submission to the Austin field office on your behalf

Request a quote →

Step 03 — Season

Presence/absence survey

Only if the habitat is there. Five visits minimum, five days apart, between March 15 and June 1, at least 60 percent before May 15, to the Service's protocol — with observation and survey-area data reported to the Austin field office by June 30.

Plan for three years. In most cases the Service requires three consecutive years of negative results before inferring absence, so this is usually a multi-season sequence rather than a single engagement.

You receive

  • A stated number of protocol site visits
  • GIS observation and survey-area data
  • A full survey report
  • Agency data submission by June 30

Request a quote →

If you are not sure where to start, start at step one. It takes days rather than seasons, and it is the conversation I would rather have in December than in April. Every quote states exactly how many site visits are included and what happens if weather costs one — because under this protocol, weather does cost them.

Common questions

What people actually ask me

These are the questions that come up in contractor groups and on first phone calls — usually answered badly, and often expensively.

Do I need a survey if I'm not removing any trees?

Possibly, and it is worth finding out rather than assuming. Two things drive the answer, and neither is simply whether trees come down. First, your city or county may require habitat verification as a condition of a permit regardless of your scope of work. Second, the Endangered Species Act defines take to include habitat modification that disrupts breeding, feeding or sheltering — which can be broader than felling trees.

The Service also recommends looking at suitable habitat within 300 feet of the project area, not only inside your property line. A short conversation about what you are doing and where usually settles it.

How do I know whether my land is even warbler habitat?

Not every property with cedar on it is. The criteria are specific: mature Ashe juniper roughly 15 feet or taller with a trunk around 5 inches through, mixed with oaks and other hardwoods, canopy cover generally above 35 percent, typically on slopes and in canyons.

Young juniper in an old field is generally not habitat. Pure cedar with no hardwoods is generally not habitat. Open savannah below 35 percent canopy is generally not habitat. If your land was cleared years ago, there is a real chance it no longer meets the description — and documenting that is far cheaper than assuming the worst.

A desktop screening is usually the fastest way to find out. I can look at aerial imagery, canopy and terrain against the criteria without anyone setting foot on the property, and tell you whether this needs to go further.

What does this cost?

It depends on acreage, access and how much of the property is potential habitat, because the protocol sets the effort: roughly one hour of survey time per 25 acres of potential habitat, per visit, with a minimum of five visits.

A habitat assessment is a fraction of a survey season and is often the right first step. If it concludes the land is not habitat, that is the end of it — and you have a documented basis for the decision rather than a hope.

What happens if I miss the spring window?

For a survey, you wait a year. March 15 to June 1 is the only window, and there is no expedited option — the birds are in Mexico and Central America the rest of the year.

A habitat assessment is not seasonal, which is why winter is a sensible time to find out whether you need a survey at all. Sorting that out in December is a great deal calmer than discovering it in April.

Can I just pay the mitigation fee instead?

In some counties, yes — Travis, Williamson and Bexar have regional conservation plans with a fee-based participation route, and for some projects that genuinely is the better deal. Most Central Texas counties have no such option.

One detail worth checking before you assume the fee is cheaper: in Travis County the mitigation fee is calculated on the entire legal tax parcel, not only the portion you are disturbing, and the rate is higher for land mapped as confirmed habitat than for unconfirmed. On a large parcel that arithmetic can change quickly. Confirm current figures with the county and run both numbers before deciding.

Isn't the warbler about to come off the endangered list?

There is a real process underway. The Service's five-year review in January 2025 recommended downlisting the species from endangered to threatened, and a petition to delist it passed its initial finding and is in a twelve-month review.

But nothing has changed yet, and a change to threatened status would not automatically remove the requirement. Planning a clearing schedule around a rule change that has not happened is a way to be wrong at your own expense.

How long does the whole thing take?

Five visits minimum, with at least five days between any two of them, so a single site occupies three to four weeks of the season at the very least — and at least 60 percent of those visits must fall before May 15.

That is why permitted surveyors are usually committed by February. If your project may need spring survey work, autumn is when to have the conversation.

What happens if it rains on a survey morning?

The morning is lost, and that is not a judgement call. The Service's requirements state that surveys "must not be conducted during unfavorable weather conditions, such as (1) wind speeds greater than 12 miles per hour, (2) fog, (3) light to heavy precipitation, and (4) temperatures less than 45°F or greater than 80°F." The same document adds that surveyors "must not conduct surveys when experiencing temporary hearing impairment, such as from illness" — these are listening surveys as much as looking ones.

Practically: if the weather turns, the visit does not count toward the five required for that site, and it has to be made up. Because no two visits may fall within five days of each other and at least 60 percent must be done before May 15, one rained-out morning in April can push a whole schedule. This is the real reason spring capacity gets committed early — a permitted surveyor has to hold slack in the calendar for weather, and there is only so much slack in eleven weeks.

Do you have to report what you find to the government?

Yes, and you should know that up front. Survey data goes to the USFWS Austin field office by June 30 each year. Habitat assessment reports go in within five business days of the determination. Those reports may be disclosed under the Freedom of Information Act.

Anyone who tells you otherwise is either not permitted or not complying with the terms of their permit. It is a condition of doing this work legally, and it is part of what you are buying — a defensible record rather than an assumption.

Adult male golden-cheeked warbler feeding a fledgling on an oak branch.

Spring 2027

Let's find out whether you need a survey

A short conversation about the property, the county and your clearing schedule is usually enough to tell you which path you are on.