Alternative Text Description for Roseate Tern

TABLE OF CONTENTS

MAP OVERVIEW

This map displays documented occurrence locations of the Roseate Tern in Florida and surrounding coastal waters. The Roseate Tern is a federally threatened or endangered bird species identified as a highest priority species in the Peninsular Florida Bird Conservation Region. The map shows point locations where this species has been observed between January 2019 and December 2024, based on citizen science observations from the eBird platform.

GEOGRAPHIC CONTEXT

The map covers the state of Florida and adjacent coastal waters, extending from the northern border with Georgia and Alabama southward through the Florida peninsula and into the Florida Keys. Major cities labeled on the map include Jacksonville on the northeast coast, Orlando in central Florida, Tampa and St. Petersburg on the west coast, and Miami on the southeast coast. Additional cities shown include Tallahassee in the north, Gainesville in north-central Florida, Palm Coast on the east coast, Lakeland in central Florida, Melbourne and Palm Bay on the east coast, Cape Coral on the southwest coast, and Coral Springs near the southeast coast. The Gulf of America borders Florida's western coastline, while the Atlantic Ocean lies to the east. The Florida Keys island chain extends southwest from the southern tip of the peninsula.

KEY INSIGHTS

Roseate Tern observations are concentrated almost entirely along Florida's coastal areas, with the highest density occurring in three distinct regions. The most significant concentration appears in the Florida Keys and the waters south of mainland Florida, where numerous observations cluster along the island chain. A secondary concentration occurs along the Atlantic coast from approximately Jacksonville southward through the central east coast near Melbourne and Palm Bay. A third notable concentration appears in the Tampa-St. Petersburg area on the Gulf of America coast. The interior of mainland Florida shows virtually no observations, indicating this species is strictly associated with coastal and marine environments. The species' occurrence pattern clearly delineates Florida's coastline through the distribution of observation points.

VISUAL ELEMENTS

Roseate Tern Occurrences

This layer represents individual documented observations of Roseate Terns reported through the eBird citizen science platform between 2019 and 2024.

Roseate Tern observation points (light blue square symbols with crossed pattern)

Appearance:

Each observation is represented by a light blue or pale cyan square symbol containing a diagonal crossed pattern, resembling a simplified bird or location marker icon.

Distribution:

Observations are distributed almost exclusively along Florida's coastline and in coastal waters, with notable concentrations along the Atlantic coast, in the Florida Keys, around Tampa Bay, and scattered along portions of the Gulf coast.

Notable locations:

The densest clustering occurs in the Florida Keys and waters immediately south of the mainland, where approximately 10-15 observation points appear in close proximity. The Atlantic coast shows a linear distribution of observations from Jacksonville southward, with concentrations near Jacksonville, the Palm Coast area, Melbourne-Palm Bay, and Port St. Lucie. The Tampa-St. Petersburg area contains multiple observations in close proximity. Cape Coral on the southwest coast shows isolated observations.

Spatial patterns:

The distribution pattern reveals a strict coastal affinity, with observations forming a boundary that traces Florida's shoreline. No observations appear more than a few miles inland from the coast. The linear arrangement along both coasts suggests the species follows coastal habitats and foraging areas. The concentration in the Keys indicates this area serves as particularly important habitat. The spacing between observation clusters along the Atlantic coast suggests the species may favor specific coastal locations rather than occurring continuously along all shoreline areas.

SYMBOL GUIDE

ADDITIONAL INFORMATION

This map represents citizen science observation data rather than comprehensive survey data, meaning the locations shown reflect where observers reported seeing Roseate Terns rather than necessarily representing all areas where the species occurs. Areas without observations may indicate either absence of the species or absence of observer coverage. The Roseate Tern is listed as federally threatened or endangered under the Endangered Species Act and has been identified by the Florida Fish and Wildlife Conservation Commission as a highest priority species for conservation in the Peninsular Florida Bird Conservation Region. The coastal and marine distribution pattern shown is consistent with the species' ecology as a seabird that nests on coastal islands and forages in shallow coastal waters.

DATA CONTEXT

Data Source:

Occurrence data was downloaded using the Global Biodiversity Information Facility (GBIF) API. The observations are derived from the EOD – eBird Observation Dataset, a biodiversity-related citizen science project managed by the Cornell Lab of Ornithology. This represents community-contributed bird observation data submitted by volunteer observers. The source data layer is EBIRD_DEC24.

Definition Query:

The data has been filtered to display only observations where DESCRIPT equals 'ROSEATE TERN', showing a single species subset from a larger bird occurrence dataset.

Scale Information:

The map displays state-level geographic extent, appropriate for viewing species distribution patterns across Florida's entire coastline and identifying major concentration areas. Individual observation points are visible and distinguishable at this scale.

Coordinate System:

NAD 1983 HARN Florida GDL Albers (WKID 3087), a projection optimized for displaying Florida's geography with minimal distortion.

Time Period of Content:

Data spans from January 1, 2019 through December 31, 2024, representing approximately six years of observation records.

Limitations:

As citizen science data, observation locations reflect observer effort and access rather than systematic survey coverage. Coastal areas near population centers and accessible beaches are likely over-represented compared to remote or restricted areas. The absence of observations in an area does not confirm absence of the species. Observation accuracy depends on volunteer observer identification skills and reporting practices. The data represents presence-only information and cannot be used to determine population size or density.

Map Coverage:

The map extent covers the entire state of Florida from its northern border with Georgia and Alabama southward through the peninsula and Florida Keys, including adjacent portions of the Gulf of America to the west and the Atlantic Ocean to the east, extending into the Straits of Florida south of the Keys.

The alternative text description of this map was AI-generated and may contain inaccuracies.