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 Peruvian Diving Petrel
Pelecanoides garnotii 
 Alternative English Names: Peruvian Diving-Petrel
 Alternative Scientific Names: [Sin Datos]
 Nombre en Español: Potoyunco Peruano
 Nombres alternativos en Español: [Sin Datos]
 
Range : RR 
Status : EN 
 
 Notes :
 
 General Information:
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 Identification Notes:
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 Similar species:
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 Taxonomic notes:
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 References:
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Peruvian Diving Petrel
 
 Distribution :
 
NOT checked in list yet
 Department  Birding Site Trail
 Ancash Huarmey coast No observations

 Arequipa Mejia Lagoons National Sanctuary Has observations
17° 08' S - 71° 51' W
 Arequipa Mejia Lagoons National Sanctuary No observations
17° 08' S - 71° 51' W
 Ica Ballestas islands Has observations
13° 44' S - 76° 25' W
 Ica Paracas and Ballestas area No observations
13° 49' S - 76° 16' W
 La Libertad
 Lambayeque
 Lima Pelagic from Lima Has observations

 Lima Pelagic from Lima Palomino and San Lorenzo island circuit Has observations
 Lima Pucusana Has observations

 Lima Pucusana Pelagic from Pucusana Has observations
 Lima Pucusana Mirador de Christo and Boqueron Has observations
12° 29' S - 76° 48' W
 Moquegua
 Piura
 Tacna Boca del Río Has observations

 Tacna Boca del Río No observations

 Lima Pelagic from Lima

 Lima Pelagic from Lima

 Ancash Huarmey coast

 
 Distribution : In GPS
 
 
 Observation/heard bird:
Last 50 Obs. 
 
1 2 3 4 5 6 »
 
 Date Location GPS
Note
Add
Author
Thursday, September 9, 2010
Depart: Lima
Birding Site: Pelagic from Lima
General:5;
Monday, July 19, 2010
Depart: Lima
Birding Site: Pelagic from Lima
General:10;
Saturday, October 18, 2008
Depart: Tacna
Birding Site: Boca del Río
General:2;
Wednesday, October 15, 2008
Depart: Lima
Birding Site: Pelagic from Lima
General:3;
Sunday, August 3, 2008
Depart: Lima
Birding Site: Pelagic from Lima
General:3;
Sunday, August 3, 2008
Depart: Lima
Birding Site: Pelagic from Lima
General:3;
Sunday, July 6, 2008
Depart: Lima
Birding Site: Pelagic from Lima
General:5;
Sunday, June 29, 2008
Depart: Lima
Birding Site: Pelagic from Lima
General:6;
Saturday, January 5, 2008
Depart: Lima
Birding Site: Pelagic from Lima
General:5;
Saturday, November 17, 2007
Depart: Lima
Birding Site: Pelagic from Lima
one seen inshore between La Punta and San Lorenzo
General:4;
Depart: Lima
Birding Site: Pelagic from Lima
 
Depart: Lima
Birding Site: Pelagic from Lima
 
Depart: Ancash
Birding Site: Huarmey coast
 
 
 
 Photos of this bird:  
 
Name:
Poss Magellan_Diving_Petrel.JPG
Date:
Author:
Ignacio García-Godos
Department:
Lima
Birding Site:
Pelagic from Lima
File:
Poss Magellan_Diving_Petrel.JPG (94993 bytes)
Comments:
This picture was taken by Juan Pedro Paz-Soldan on a Pelagic from Callao on Oct 26, 2003. We had an unusual number of seen Diving-Petrels (over 50 total) and just as I recalled that this may well prove to be our highest count ever of Peruvian Diving-Petrel, I started wondering whether there may be other species involved. We repeated out loud caracters of Magellanic Diving-Petrel. Neck-collar and maybe somewhat more blackish plumage and soon enough we found birds that fitted to this description and Juan Pedro manage to get this shot. We were then quite convinced that this could be the first confirmed record of Magellanic Diving-Petrel from Peru. Later I noticed also that a particular bird on the water with a neck-collar looked smaller than "good" Peruvian Diving-Petrels seen later. This photo however shows a smudge in the collar and probably disqualifies the ID?

Gunnar Engblom
Kolibri Expeditions
kolibriexp@telefonica.net.pe
www.kolibriexpeditions.com

Postscript: Alvaro Jaramillo has later confirmed that it is a Peruvian Diving Petrel. See his new book Birds of Chile for a thorogh discussion regarding identification of Diving Petrels in the East Pacific.

Here are Alvaros comments:
Gunnar,

I checked out the photos on your website and I would call this bird a fine Peruvian Diving-Petrel, not a Magellanic. There are a few features that the books don´t usually mention that work for separating the two.
First of all size is a big one, while on measurements Magellanic averages only about 10% smaller, in actual bulk (mass) it is much, much smaller.
Comparing specimens this is really clear. In a group of Peruvians, a Magellanic would be unequivocally smaller. Mass is a cubic function so a 10% difference in linear measurements, creates a much larger difference in mass. Here are the rest:

1) Face pattern. Magellanic has a broad and obvious white collar that extends well up on the neck, it is highlighted by a thin and crisp dark spur that extends down on the sides of the breast. Peruvians do not show this spur, but show a broad dusky wash on the breast side like your bird does. The effect of the spur and white collar is that it sets off a dark cap on Magellanic, partially due to the distribution of black and white, but also because the interface between the two colours is sharper. Your bird lacks the capped look. It is normal, and even typical for Peruvian to show a pale or whitish area behind the ear coverts, but it is not the crisp whitish collar of Magellanic.

2) Bill size. Peruvian has a long and thick bill for a Diving Petrel, Magellanic a small bill. Your bird shows a typically large bill of a Peruvian.

3) Magellanic has pale grey or whitish flanks, not the dusky grey flanks of Peruvian. Your bird has the dusky grey flanks.

4) Magellanic has a whitish underwing, in fact the whitest underwing of any diving-petrel. Peruvian has a grey or dusky underwing. Your bird has the dusky typical of Peruvian.

5) The white trailing edge on the secondaries is broad and noticeable on Magellanic, Peruvian shows a narrow one. Beware that this is heavily affected by wear. Your bird shows almost no pale on the trailing edge of the secondaries.

I should note that our field guide to the Birds of Chile is finally out, and it deals with many of seabirds and species of southernmost Peru. I hope you folks find it useful! The diving-petrels are treated in there, the above points come from the book. Note that our plate of Peruvian shows more white on the secondaries than perhaps it should.

cheers

Alvaro

Alvaro Jaramillo
chucao@comcast.net
Montara, California
 
Name:
Peruvian-Diving-Petrel-smal.jpg
Date:
Author:
Gunnar Engblom
Department:
Lima
Birding Site:
Pelagic from Lima
File:
Peruvian-Diving-Petrel-smal.jpg (27672 bytes)
Comments:
Peruvian Diving-Petrel taking off. Whale-watch. Nov 25.
Photo Gunnar Engblom.
Birding Peru with Kolibri Expeditions
More Birds!
 
Name:
PDP.JPG
Date:
Author:
Ignacio García-Godos
Department:
Ancash
Birding Site:
Huarmey coast
File:
PDP.JPG (0 bytes)
Comments:
 
 
 Songs and calls:  
 
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