McGILL BIRD OBSERVATORY

PHOTO LIBRARY

Purple Finch (Carpodacus purpureus)

 Seasonal status at MBO:

JAN
       
FEB
       
MAR
       
APR
       
MAY
       
JUN
       
JUL
       
AUG
       
SEP
       
OCT
       
NOV
       
DEC
       
  common
  fairly common
  uncommon
  rare
  occasional
  no records
 
QUICK TIPS:
1) Look at the overall appearance - only AHY/ASY males have extensive reddish-purple plumage, while HY/SY males are mostly to entirely brown with sometimes a few reddish tinges, and females are entirely brown.

2) Look at the outer rectrices - they are narrow and pointed at the tip on HY/SY birds, and broad and relatively rounded on AHY/ASY birds

3) Check the primary coverts - they are narrow and pointed and contrastingly paler than the adjacent greater coverts on HY/SY birds, and relatively broad and rounded and not contrasting in colour or wear with the greater coverts on AHY/ASY birds

4) Examine the greater coverts - on some HY/SY birds there is a visible moult limit between paler outer coverts and darker inner coverts that have been replaced; on other HY/SY birds and all AHY/ASY birds there is no moult limit among the greater coverts

Ageing and sexing guidelines:

January - August:

ASY - M
Upper breast, head, back, and wings washed with red/purple.

ASY - F
Plumage brown and white, distinguished from younger males and females by broad and truncate primary coverts and rectrices
 
SY - M
Similar to ASY-F, but with primary coverts and rectrices tapered and faded; may have faint red tinge to plumage

SY - U
Similar to SY-M; in the absence of any red plumage, sexes may be distinguished only by cloacal protuberance or brood patch.

-

September - December:

AHY - M
Upper breast, head, back, and wings washed with red/purple.

   
AHY - F
Plumage brown and white, distinguished from younger males and females by broad and truncate primary coverts and rectrices

   
SY - F
Similar to AHY-F, but with outer primary coverts very faded.

HY - U
Similar to SY-F; sex generally not distinguishable
JUV - U
Similar to HY-U, with loosely textured undertail coverts
     
 

Ageing and sexing details:

after-second-year male

ASY males are easily recognizable by the strong red/purple wash across the upper breast, head, back, and wings.  No other age or sex class has more than a trace of red.


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007


Photo by Marcel Gahbauer, McGill Bird Observatory, May 2005  
 


Check for broad and truncate primary coverts on ASY Purple Finches.  Also, ASY males are the only age/sex class in which there is an appreciable amount of red on the upper wing.


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007


Rectrices of ASY Purple Finches are noticeably more broad and truncate than those of SY birds, which are usually quite pointed. 


 Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007

RETURN TO AGE/SEX OVERVIEW

 

after-second-year female

Plumage is brown and white, as is the case for SY Purple Finches of both sexes.  Wings and tail should be checked to assess age, while the presence of a brood patch during the breeding season can be used to identify females.


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007
 


Check for broad and truncate primary coverts on ASY Purple Finches.  Also, on ASY birds the coverts are uniform in colour and wear.


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007
 


Rectrices of ASY Purple Finches are noticeably more broad and truncate than those of SY birds, which are usually quite pointed.


 

RETURN TO AGE/SEX OVERVIEW

 

second-year male

SY male Purple Finches may be entirely brown and white, but can also show faint traces of red, especially on the head, upper breast, and wings.  However, sexing by cloacal protuberance is most reliable, and age should be confirmed by wing and tail.


Photo by Marcel Gahbauer, McGill Bird Observatory, May 2006


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2006


There may be a trace of red on the wings, as in the first photo below, or none at all, as in the second.  The outer primary coverts are generally fairly narrow and tapered, with only narrow pale edging.  There may be a molt limit among the greater coverts


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2006


Photo by Marcel Gahbauer, McGill Bird Observatory, May 2006
 


SY birds have relatively pointed outer rectrices.


Photo by Marcel Gahbauer, McGill Bird Observatory, May 2006

RETURN TO AGE/SEX OVERVIEW

 

second-year unknown

SY birds entirely lacking red can be sexed only by cloacal protuberance or brood patch.


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007
 


The outer primary coverts are generally fairly narrow and tapered, with only narrow pale edging.  There may be a molt limit among the greater coverts


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007
 


SY birds have relatively pointed outer rectrices.


Photo by Marie-Anne Hudson, McGill Bird Observatory, May 2007

RETURN TO AGE/SEX OVERVIEW

 

after-hatch-year male

Only AHY males have a purple/red wash over their upper breast, head, back, and wings.  Some individuals retaining brown feathers, such as the male pictured below, may be considered SY.


Photo by Marcel Gahbauer, McGill Bird Observatory, October 2004
 




 



 

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after-hatch-year female

AHY females are brown and white, as are HY Purple Finches of both sexes.  The shape of the outer rectrices are the easiest indicator of age, and moult patterns on the wing are also useful.


 
 


AHY females show no moult limit among the coverts, and have broad and truncate outer primary coverts with fairly distinct pale edging.



 


The outer rectrices of AHY Purple Finches are broad and quite rounded at the tip.


 

RETURN TO AGE/SEX OVERVIEW

 

second-year female

Some AHY birds can be reliably aged as SY at least until late in their prebasic moult by the presence of very worn and faded unreplaced juvenal primary coverts.


Photo by Marcel Gahbauer, McGill Bird Observatory, August 2005
 


Note the extreme contrast between the very faded (and long) juvenal outer primary covert and the newly grown adult coverts.


Photo by Marcel Gahbauer, McGill Bird Observatory, August 2005
 


SY birds have relatively pointed outer rectrices prior to their prebasic moult; the individual in the photo below has just replaced its tail and is showing broader rectrices typical of an AHY bird.  Note the very worn condition of the outer primaries.


Photo by Marcel Gahbauer, McGill Bird Observatory, August 2005

RETURN TO AGE/SEX OVERVIEW

 

hatch-year unknown

HY Purple Finches are heavily streaked brown/white all over, lacking reddish tones anywhere.  Sex can generally not be determined at this age.  HY birds are best separated from AHY females by having narrower and more pointed primary coverts and rectrices.


Photo by Marcel Gahbauer, McGill Bird Observatory, October 2004
 


HY Purple Finches may show a moult limit among greater coverts; in this case the inner greater coverts are in the process of being replaced.  The primary coverts have little pale edging, and the outer coverts (though not well visible in this photo) are relatively narrow and pointed.


Photo by Marcel Gahbauer, McGill Bird Observatory, October 2005


Photo by Marie-Anne Hudson, McGill Bird Observatory, August 2007
 


HY Purple Finches have pointed rectrices.


Photo by Marcel Gahbauer, McGill Bird Observatory, October 2005

RETURN TO AGE/SEX OVERVIEW

 

juvenile unknown

 



 




 



 

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