The Permanence Field Tells You More Than the Species Count
Pond permanence—whether a waterbody never dries, rarely dries, or only forms when it rains heavily—predicts amphibian community composition more reliably than almost any other single habitat variable. A pond that dries two out of five years cannot support great crested newt populations past the larval stage, but it can produce exceptional common toad numbers in good years because toads tolerate higher desiccation risk during egg development. When you record Permanence against every survey visit, you build the baseline that explains why Walthamstow Wetlands and Woodberry Wetlands support different assemblages even when they are surveyed the same week by the same recorder.
This template captures permanence as a structured choice field with seven gradations, from "Never dries" down to "Temporal—only forms when it rains a lot." That resolution matters at the landscape scale. An LWT site manager reviewing Ickenham Marshes pond data three years after initial survey can see whether a waterbody's permanence classification has changed—which can indicate changed drainage, vegetation encroachment, or hydrological connectivity shifts that wouldn't be visible from species counts alone.
What the Dual Survey Methodology Actually Records
The vis+net methodology means two distinct passes: visual survey first, then torch-and-net or torching for newts. The template structures this by carrying parallel count fields for both methods within a single record, with separate subheaders for frogs & toads and for newts under each pass. This is not redundancy—it is the only way to properly separate detection probabilities between methods.
The invasive species fields are not ornamental. Marsh frog (Pelophylax ridibundus), American bullfrog (Lithobates catesbeianus), edible frog, and pool frog each get their own count field, discrete from native species. This matters operationally: if you aggregate invasive and native counts into the same field during fast torch surveys at a site like Camley Street, you lose the ability to track colonization rates or assess the impact of management interventions targeting invasives. The separation is the data integrity mechanism.
The newt section covers great crested (Triturus cristatus), palmate (Lissotriton helveticus), smooth (Lissotriton vulgaris), and alpine newt (invasive). GCN count accuracy at the adult stage is where legal implications enter the data. The field hint embedded in the template—"If you find a folded leaf, do not open it! It is an egg of a great crested newt"—is not documentation for beginners. It is a protocol reminder that belongs at the data entry layer, not in a separate training document that gets detached from the survey form.
The Spawn and Tadpole Fields Are Longitudinal Data Points
Frog spawn clump count and egg number are two separate fields because they answer two different questions. Clump count tells you how many females bred at this pond; egg number gives you a rough reproductive output figure. Both degrade as data if the survey happens more than a day after peak spawning because clumps merge and individual egg mass boundaries become impossible to distinguish. The timestamp on the record—date and time via the datetime field combined with GPS location—pins the observation to the exact conditions that produced it.
Toad spawn is recorded differently: as string count and estimated total. Toad spawn strings are individually trackable longer than frog masses, but estimation error compounds quickly in dense vegetation. The field's "estimated numbers" label is doing real epistemological work—it signals that precision beyond order of magnitude is not claimed.
Newt spawn is listed as estimated numbers only. GCN females lay eggs singly on folded leaves, one per day, across weeks. Any count at a point in time is a minimum, not a census. Experienced surveyors know this; the field structure records the minimum count without implying it is exhaustive.
Habitat assessment runs alongside every survey record: percentage shade on the water surface, percentage coverage by emergent, submerged, and floating plants (excluding duckweed, Pennywort, algae), fish presence with quality graded from confident absence to known dense population, and waterfowl impact from no evidence through severe impact. These are not background fields. At Spencer Road Wetlands or Frays Farm Meadows, year-on-year deterioration in the fish or waterfowl fields against declining newt adult counts is the kind of correlation that justifies habitat management budgets.
The Site field is a pre-populated choice list of twenty LWT sites in London, from Birdbrook to Yeading Brook Meadows. Recorder name is a free-text field, not a user account—which means it survives team turnover without requiring database reconfiguration. Pond ID is a simple numeric code, no more complex than the pond needs to be.