Using this page

 

Glossary of Terms

 

 

IUCN:  International Union for the Conservation of Nature

 

EPBC: Environmental Protection and Biodiversity Conservation Act 1999

 

AOO - Area of Occurence: the geographical areas in which a species is normally found.

 

EOO - Extent of Occurence

 

 

 

Images

 

Click on images and maps to see larger versions - once revealed click on screen away from image to return to original view.

Key to maps

reddot.png(red dots) core records, known to represent existing locations of focal taxa; in the case of intra-continental migrants, only records approximating the taxon’s breeding distribution are used.

orangedot(orange dots) non-core records, representing vagrant occurrences of the focal taxon obviously outside its usual range, or historical observations of a taxon known to be extinct at that location.

greydot(grey dots) records of other subspecies of the same species as the focal taxon; or in the case of intra-continental migrants, non-breeding records of the focal taxon not included as core records.

blueploy(blue polygons) minimum convex polygons underlying the locational records on the maps that depict each existing taxon’s Extent of Occurrence (EOO).

yellowpoly

(yellow polygons) areas formerly occupied by Extinct taxa.

 

redarrow(red arrows) the location of taxa with very small distributionsand known seabird breeding locations.

Maps were made using the Geoscience Australia Lambert Conformal Conic (GALCC) projection.

 

     

Taxa data image

Yellow Chat (Alligator Rivers)

Subspecies Conservation Summary

Image  

Image copyright Bird Explorers

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Image required click here to contribute.

Map of Distribution  

Image copyright to Glenn Ehmke, Birds Australia

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Download data (.csv file)

Epthianura crocea tunneyi

Meliphagidae

Population type  

Endemic Australian taxon

IUCN Red List Status 2010  

Endangered B2ab(ii,iii,iv,v), C2a(ii)

Environmental Protection and Biodiversity Conservation Act Status  

Endangered

Reason if Threatened or Near Threatened  

Poplulation of 250-2,500 mature individuals occupying and area less than 500 km2 in a single subpopulation at less than 5 locations.

Continuing decline in area occupied, habitat quality, no. locations, no. mature individuals, probably from a combination of introduced weeds, feral animals and saline intrusion

IUCN Red List Status 2000  

Endangered B2ab(ii,iii,iv,v), C2a(ii)

Reason if changed in 2010  

No change

IUCN Red List Status 1990  

Endangered B2ab(ii,iii,iv,v), C2a(ii)

Reason if changed in 2000  

No change

Current Eligibility against IUCN Red List Criteria  

.

IUCN Category

Criteria Eligibility

A

Not applicable - past, current or future population declines are thought unlikely to exceed 20% in any 3 generation period

B

Endangered - AOO less than 500 km², at no more than 5 locations with plausible future threat, inferred continuing decline in habitat quality

C

Endangered - population 250-2,500 mature individuals, suspected continuing decline, greater than 95% mature individuals in 1 subpopulation

D

Not applicable - population greater than 1,000 mature individuals, greater than 5 locations

E

Not applicable - no population viability analysis undertaken

IUCN Red List Assessment Data  

.

Parameter  

Estimate

Reliability

Extent of Occurrence   

1700 km2

medium

trend  

stable

low

Area of Occupancy  

170 km2

low

trend  

decreasing

low

Number of Mature Individuals  

500

medium

trend  

decreasing

medium

Number of sub-populations  

1

high

Number of locations  

5

medium

Largest sub-population  

500

medium

Generation time  

5.8 years

low

Global population share  

100%

high

Level of genetic exchange  

nil

high


Project Partners

CDU Logo University of Queensland Bird Life International Australian Wildlife Conservancy Biosis Research  

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