Sea Turtle Nest Monitoring System

Florida

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Nests
1-5
6-10
11-20
21-40
40+

Beach Description

Guana Tolomato Matanzas National Estuarine Research Reserve (GTM Research Reserve) is dedicated to the conservation of natural biodiversity and cultural resources through research and monitoring to guide science-based stewardship and education strategies.

GTM NERR marine turtle team patrols 7.7 miles of beach which is comprised of two segments: Guana River South and Guana Tolomato Matanzas NERR ("North Beach”).

Guana River South is a 3.5-mile stretch of beach bordered by private homes and rental properties. The only public access is via the gas station south of the GTM NERR entrance at 505 Guana River Road. North Beach is a 4.2-mile stretch of remote beach with three public access points. Both beaches conduct State Nesting Beach Surveys (SNBS) but only the North Beach participates in the Index Beach Nesting Survey (INBS).

Adopt-a-Nest from Guana Tolomato Matanzas NERR, St. Johns


Year

The data presented here should be considered preliminary in nature. All data, figures and maps on this website remain copyright of the project coordinators and may not be used or referenced without the explicit written consent of the data owners.

Summary What does this mean Activity

Nests: 227
  In Situ: 227
  Incubating: 16
  Inventoried: 199 (87.6%)
  Unknown: 12
False Crawls: 164

Estimated Eggs to Date: 21447
  Eggs Lost: 25 (0.1%)
  Hatched Eggs: 18421
  Emerged Hatchlings: 17984
  Mean Incubation Duration (all): 52.9 days

Mean Hatch Success: 85.8%
Mean Emergence Success: 83.7%
Nest Success: 92%
Beach Success: 58%

Last Updated: 2026-09-23 11:05:10 (38.1 hours ago)

Hover mouse over each chart for a description.

Significant Nest Losses
Egg Status Egg Losses
SpeciesNestsFalse Crawls
Loggerhead215158
Green Turtle116
Leatherback1