DOI: 10.5061/dryad.1ns1rn93f
title: Variation in population size, nest distribution, colony extent, and timing of movements at the largest known parrot colony

description: Psittaciformes are among the most threatened birds, and population size
 and trend estimates are needed to aid conservation. The burrowing parrot
 (Cyanoliseus patagonus) is undergoing substantial changes in its
 population size, due to habitat degradation, trapping for the pet trade,
 and persecution as a crop pest. The species formerly had several large
 colonies, but these were severely reduced during a program of agriculture
 pest control. Currently, only one large colony remains, together with a
 decreasing number of smaller colonies spread throughout the Monte and
 adjacent ecoregions. The colony at El Cóndor, north-eastern Patagonia,
 Argentina, is of particular importance, concentrating 71% of the global
 breeding population of burrowing parrots. We aimed to determine changes in
 1) breeding population size, 2) the extent of the colony, 3) the
 distribution of nests along the colony, and 4) the timing of movements
 from the nest to the foraging locations during the breeding season, over
 our long-term study (1998-2019). We found that the number of active nests
 declined from 37531 in 2001 to 21883 in 2005, and recovered in the
 following years, reaching 40671 nests in 2019. The decline observed in
 2005 could be related to droughts and associated food shortage during the
 La Niña phase of El Niño Southern Oscillation. The colony expanded
 westwards, from 9 km length in 2001, to 18.1 km in 2019. During the same
 period, the part of the colony with the highest number of active nests
 shifted 5 km westwards from El Cóndor village. Both changes could be the
 consequence of human disturbance. As any serious threat affecting this
 colony could have severe consequences for the survival of the species,
 regular monitoring is needed, together with legal protection of the
 burrowing parrot colony at El Cóndor and the Monte ecosystem around it.
description: The dataset consist of photographs taken at the burrowing parrot
 <em>Cyanoliseus patagonus</em> colony at El Cóndor, village,
 adjacent to the estuary of the Río Negro in Río Negro, north-eastern
 Patagonia, Argentina, from 2001 to 2019.  During the
 earlier years of current study (breeding seasons 2004-2005, and
 2005-2006), we followed the methodology of Masello et al. (2006) to
 estimate of the breeding population size of El Cóndor colony (breeding
 season 2001-2002, hereafter 2001). We photographed the entirety of the
 densest part of the colony (easternmost; Table 1). This is a part of the
 cliff, up to 27 m high, where soft sandstone layers belonging to the Río
 Negro geological formation make the entire cliff. In this part of the
 colony, the parrots dig their nests between 3 and 26.5 m above sea level.
 However, for the westernmost part of the colony, sample photographs were
 taken every 450 m, and the total number of nests in the 450-m sector was
 extrapolated from these photographs (Masello et al. 2006). In more recent
 years (breeding seasons 2007-2008, 2008-2009, and 2019-2020), following
 advances in digital photography, we took a continuous series of digital
 photographs (3000 x 4000 pixels) covering the entire colony. This means,
 that the nest counts for those later years represent a complete census of
 the colony. We took all photographs of the Burrowing
 Parrot colony from the sandy beach exposed at the bottom of the cliff
 during low tide. The colony is accessible from its easternmost end
 (kilometre 1), and from three man-made accesses cut in the cliff and
 situated at the easternmost part of kilometre 2 (car access called
 ‘Segunda Bajada del Faro’), in kilometre 15 (pedestrian access, ‘El
 Espigón’), and at the easternmost part of kilometre 17 (pedestrian access,
 ‘Playa Bonita’). Using those accesses, we were able to walk along the
 cliff, from the vicinity of El Cóndor village to up to three kilometres
 past the pedestrian access at kilometre 17; thus, we were able to survey
 the entire Burrowing Parrot colony. During low tide, we were able to shoot
 photographs from 150 to 170 m away from the cliff. This, resulted in
 larger sector of the cliff included in each photograph (approximately 200
 m). During high tide, we had to take the photographs closer to the cliff
 (40 to 50 m), resulting in shorter sectors being captured per photograph
 (approximately 50 m). Due to the sheer size of the colony, we took the
 photographs over four to five days of fieldwork during each studied
 season. For this reason, the photographs show small differences in
 illumination. To minimize such differences, and to avoid strong shadows
 that could create false structures in the images, we took the photographs
 during overcast days. Masello, J.F., Pagnossin, M.L.,
 Sommer, C., Quillfeldt, P. 2006. Population size, provisioning frequency,
 flock size and foraging range at the largest known colony of
 Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian
 coastal cliffs. <em>Emu,</em> 106: 69-79.
description: # Variation in population size, nest distribution, colony extent, and
 timing of movements at the largest known parrot colony
 [https://doi.org/10.5061/dryad.1ns1rn93f](https://doi.org/10.5061/dryad.1ns1rn93f) ## Description of the data and file structure The dataset consist of photographs taken at the burrowing parrot *Cyanoliseus patagonus* colony at El Cóndor, village, adjacent to the estuary of the Río Negro in Río Negro, north-eastern Patagonia, Argentina, from 2001 to 2019.  The dataset is divided in the following folders: 2001-2002 2004-2005 2005-2006 2007-2008 2008-2009 2019-2020 The name of the folder corresponds to the breeding season in which the photographs were taken. The photograph series progress from the easternmost end of the colony to the westernmost, except for the breeding season 2019-2020 for which the opposite is true. For the breeding seasons 2004-2005 and 2005-2006, the photographs corresponding to the easternmost kilometre of the colony are located in a dedicated subfolder within the folder corresponding to each breeding season. For the breeding season 2019-2020, the photographs are located in four subfolders that correspond to the four days in which the photographs were taken. The name of the subfolders indicate the portion of the colony to which the photographs belong. The photograph series progresses from the westernmost (part_1) end of the colony to its easternmost end (part_4). Additional note: the people who appear in some of the photographs are the authors of the dataset and associated manuscript. For further details, please, read: Masello JF, Pagnossin ML, Sommer C, Quillfeldt P (2006). Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs. *Emu,* 106: 69-79. Masello JF, Gonther L, Failla M, Wemhoff-de Groot H, Llanos F, Sommer C, Mundry R, Seijas V, Quillfeldt P (2024): Variation in population size, nest distribution, colony extent, and daily movements at the largest known parrot colony: implications for the conservation of Burrowing Parrots. Wildlife Biology Article DOI: 10.1002/wlb3.01295 ### Files and variables #### File: photographs\_2001-2019\_burrowing\_parrot\_colony\_El\_Cóndor.zip **Description:** The dataset consists of photographs taken at the burrowing parrot *Cyanoliseus patagonus* colony at El Cóndor, village, adjacent to the estuary of the Río Negro in Río Negro, north-eastern Patagonia, Argentina, during 6 breeding seasons, from 2001 to 2019.  2001-2002: folder corresponding to the breeding season 2001-2002 List of the photographs from the easternmost to the westermost part of the colony El Condor_2km_primeros_metros_Dec2004.JPG Pict0001.jpg Pict0002.jpg Pict0003.jpg Pict0004.jpg Pict0005.jpg Pict0006.jpg Pict0007.jpg Pict0008.jpg Pict0009.jpg Pict0010.jpg Pict0011.jpg Pict0012.jpg Pict0013.jpg Pict0014.jpg Pict0015.jpg Pict0016.jpg Pict0017.jpg Pict0018.jpg Pict0019.jpg Pict0020.jpg Pict0021.jpg Pict0022.jpg Pict0023.jpg Pict0024.jpg Pict0025.jpg Pict0026.jpg Pict0027.jpg Pict0028.jpg Pict0029.jpg Pict0030.jpg Pict0031.jpg Pict0032.jpg Pict0033.jpg Pict0034.jpg Pict0035.jpg Pict0036.jpg Pict0037.jpg Pict0038.jpg Pict0039.jpg Pict0040.jpg Pict0041.jpg Pict0042.jpg Pict0043.jpg Pict0044.jpg Pict0045.jpg Pict0046.jpg Pict0047.jpg Pict0048.jpg Pict0049.jpg Pict0050.jpg Pict0051.jpg Pict0052.jpg Pict0053.jpg Pict0054.jpg Pict0055.jpg Pict0056.jpg Pict0057.jpg Pict0058.jpg Pict0059.jpg Pict0060.jpg Pict0061.jpg Pict0062.jpg Pict0063.jpg Pict0064.jpg Pict0065.jpg Pict0066.jpg 2004-2005: folder corresponding to the breeding season 2004-2005 List of the photographs from the easternmost to the westermost part of the colony 100_0057.JPG 100_0058.JPG 100_0059.JPG 100_0060.JPG 100_0063.JPG 100_0064.JPG 100_0065.JPG 100_0066.JPG 100_0067.JPG 100_0068.JPG 100_0069.JPG 100_0070.JPG 100_0071.JPG 100_0072.JPG 100_0073.JPG 100_0074.JPG 100_0075.JPG 100_0076.JPG 100_0077.JPG 100_0078.JPG 100_0079.JPG 100_0080.JPG 100_0081.JPG 100_0082.JPG 100_0083.JPG 100_0084.JPG 100_0085.JPG 100_0086.JPG 100_0087.JPG 100_0088.JPG 100_0089.JPG 100_0090.JPG 100_0091.JPG 100_0092.JPG 100_0093.JPG 100_0094.JPG 100_0095.JPG 100_0096.JPG 100_0097.JPG 100_0098.JPG 100_0099.JPG 100_0100.JPG 100_0101.JPG 100_0102.JPG 100_0103.JPG 100_0104.JPG 100_0105.JPG 100_0106.JPG 100_0107.JPG 100_0108.JPG 100_0109.JPG 100_0110.JPG 100_0111.JPG 100_0112.JPG 100_0113.JPG 100_0114.JPG 100_0115.JPG 100_0116.JPG 100_0117.JPG 100_0118.JPG 100_0119.JPG 100_0120.JPG 100_0121.JPG 100_0122.JPG 100_0123.JPG 100_0124.JPG 100_0125.JPG 100_0126.JPG 100_0127.JPG 100_0128.JPG 100_0129.JPG 100_0130.JPG 100_0131.JPG 100_0132.JPG 100_0133.JPG 100_0134.JPG 100_0135.JPG 100_0136.JPG 100_0137.JPG 100_0138.JPG 100_0139.JPG 100_0140.JPG 100_0141.JPG 100_0142.JPG 100_0143.JPG 100_0144.JPG 100_0145.JPG 100_0147 (ECC4).JPG 100_0148 (ECC3).JPG 100_0149 (ECC3).JPG 2004-2005\first kilometre: subfolder corresponding to the easternmost kilometre of the colony during the breeding season 2004-2005 List of the photographs from the easternmost kilometre of the colony pogressing towards the west 100_0200.JPG 100_0201.JPG 100_0202.JPG 100_0203.JPG 100_0204.JPG 100_0205.JPG 100_0206.JPG 100_0207.JPG 100_0208.JPG 100_0209.JPG 100_0210.JPG 100_0211.JPG 100_0212.JPG 100_0213.JPG 100_0214.JPG 100_0215.JPG 100_0216.JPG 100_0217.JPG 100_0218.JPG 100_0219.JPG 100_0220.JPG 100_0221.JPG 100_0222.JPG 100_0223.JPG 100_0224.JPG 100_0225.JPG 100_0226.JPG 2005-2006: folder corresponding to the breeding season 2005-2006 List of the photographs from the easternmost to the westermost part of the colony 01_17.12.05.JPG 02_17.12.05.JPG 03_17.12.05.JPG 05_17.12.05.JPG 06_17.12.05.JPG 07_17.12.05.JPG 08_17.12.05.JPG 09_17.12.05.JPG 13_17.12.05.JPG 14_17.12.05.JPG 15_17.12.05.JPG 16_17.12.05.JPG 17_17.12.05.JPG 18_17.12.05.JPG 19_17.12.05.JPG 20_17.12.05.JPG 22_17.12.05.JPG 23_17.12.05.JPG 24_17.12.05.JPG 25_17.12.05.JPG 26_17.12.05.JPG 27_17.12.05.JPG 28_17.12.05.JPG 29_17.12.05.JPG 30_17.12.05.JPG 31_17.12.05.JPG 33_17.12.05.JPG 34_17.12.05.JPG 35_17.12.05.JPG 36_17.12.05.JPG 37_17.12.05.JPG 38_17.12.05.JPG 40_17.12.05.JPG 41_17.12.05.JPG 42_17.12.05.JPG 43_17.12.05.JPG 44_17.12.05.JPG 45_17.12.05.JPG 46_17.12.05.JPG 47_17.12.05.JPG 48_17.12.05.JPG 49_17.12.05.JPG 50_17.12.05.JPG 51_17.12.05.JPG 52_17.12.05.JPG 53_17.12.05.JPG 55_17.12.05.JPG 56_17.12.05.JPG 57_17.12.05.JPG 58_17.12.05.JPG 60_17.12.05.JPG 61_17.12.05.JPG 62_17.12.05.JPG 63_17.12.05.JPG 64_17.12.05.JPG 65_17.12.05.JPG 67_17.12.05.JPG 68_17.12.05.JPG 69_17.12.05.JPG 70_17.12.05.JPG 71_17.12.05.JPG 73_17.12.05.JPG 74_17.12.05.JPG 75_17.12.05.JPG 76_17.12.05.JPG 78_17.12.05.JPG 79_17.12.05.JPG 80_17.12.05.JPG 82_17.12.05.JPG 83_17.12.05.JPG 86_20.12.05.JPG 87_20.12.05.JPG 88_20.12.05.JPG 89_20.12.05.JPG 90_20.12.05.JPG 91_20.12.05.JPG 92_20.12.05.JPG 93_20.12.05.JPG 94_20.12.05.JPG 95_20.12.05.JPG 96_20.12.05.JPG 97_20.12.05.JPG 98_20.12.05.JPG 99_20.12.05.JPG 100_20.12.05.JPG 101_20.12.05.JPG 102_20.12.05.JPG 103_20.12.05.JPG 104_20.12.05.JPG 105_20.12.05.JPG 106_20.12.05.JPG 107_20.12.05.JPG 108_20.12.05.JPG 109_20.12.05.JPG 10_17.12.05.JPG 110_20.12.05.JPG 112_20.12.05.JPG 113_20.12.05.JPG 114_20.12.05.JPG 115_20.12.05.JPG 116_20.12.05.JPG 117_20.12.05.JPG 118_20.12.05.JPG 119_20.12.05.JPG 11_17.12.05.JPG 120_20.12.05.JPG 121_20.12.05.JPG 122_20.12.05.JPG 123_20.12.05.JPG 125_20.12.05.JPG 126_20.12.05.JPG 127_20.12.05.JPG 128_20.12.05.JPG 129_20.12.05.JPG 12_17.12.05.JPG 130_20.12.05.JPG 131_20.12.05.JPG 132_20.12.05.JPG 133_20.12.05.JPG 134_20.12.05.JPG 135_20.12.05.JPG 100_20.12.05.JPG 101_20.12.05.JPG 102_20.12.05.JPG 103_20.12.05.JPG 104_20.12.05.JPG 105_20.12.05.JPG 106_20.12.05.JPG 107_20.12.05.JPG 108_20.12.05.JPG 109_20.12.05.JPG 10_17.12.05.JPG 110_20.12.05.JPG 112_20.12.05.JPG 113_20.12.05.JPG 114_20.12.05.JPG 115_20.12.05.JPG 116_20.12.05.JPG 117_20.12.05.JPG 118_20.12.05.JPG 119_20.12.05.JPG 11_17.12.05.JPG 120_20.12.05.JPG 121_20.12.05.JPG 122_20.12.05.JPG 123_20.12.05.JPG 125_20.12.05.JPG 126_20.12.05.JPG 127_20.12.05.JPG 128_20.12.05.JPG 129_20.12.05.JPG 12_17.12.05.JPG 130_20.12.05.JPG 131_20.12.05.JPG 132_20.12.05.JPG 133_20.12.05.JPG 134_20.12.05.JPG 135_20.12.05.JPG SIMG0063.JPG SIMG0064.JPG SIMG0066.JPG SIMG0067.JPG SIMG0068.JPG SIMG0069.JPG SIMG0070.JPG SIMG0071.JPG 2005-2006\1Km: subfolder corresponding to the easternmost kilometre of the colony during the breeding season 2005-2006 List of the photographs from the easternmost kilometre of the colony pogressing towards the west km1_2.JPG km1_3.JPG km1_4.JPG km1_5.JPG km1_6.JPG km1_7.JPG km1_8.JPG km1_9.JPG km1_10.jpg km1_11.JPG km1_12.JPG km1_13.JPG km1_14.JPG km1_15.JPG km1_16.JPG km1_17.JPG km1_18.JPG km1_19.JPG km1_20.JPG km1_21.JPG km1_22.JPG km1_23.JPG km1_24.JPG km1_25.JPG km1_26.JPG km1_27.JPG km1_28.JPG km1_29.JPG km1_31.JPG km1_32.JPG km1_33.JPG km1_34.JPG km1_35.JPG km1_36.JPG km1_37.JPG km1_38.JPG km1_39.JPG km1_40.JPG km1_41.JPG km1_42.JPG km1_44.JPG km1_45.JPG km1_46.JPG km1_47.JPG km1_48.JPG 2007-2008: folder corresponding to the breeding season 2007-2008 List of the photographs from the easternmost to the westermost part of the colony IMG_8300.JPG IMG_8301.JPG IMG_8302.JPG IMG_8303.JPG IMG_8304.JPG IMG_8305.JPG IMG_8306.JPG IMG_8307.JPG IMG_8308.JPG IMG_8309.JPG IMG_8310.JPG IMG_8311.JPG IMG_8377.JPG IMG_8378.JPG IMG_8379.JPG IMG_8380.JPG IMG_8381.JPG IMG_8382.JPG IMG_8383.JPG IMG_8384.JPG IMG_8385.JPG IMG_8386.JPG IMG_8389.JPG IMG_8390.JPG IMG_8391.JPG IMG_8393.JPG IMG_8394.JPG IMG_8395.JPG IMG_8396.JPG IMG_8397.JPG IMG_8398.JPG IMG_8399.JPG IMG_8401.JPG IMG_8402.JPG IMG_8403.JPG IMG_8404.JPG IMG_8405.JPG IMG_8406.JPG IMG_8407.JPG IMG_8408.JPG IMG_8409.JPG IMG_8410.JPG IMG_8411a.JPG IMG_8411b.JPG IMG_8411c.JPG IMG_8411d.JPG IMG_8411e.JPG IMG_8411f.JPG IMG_8411g.JPG IMG_8411h.JPG IMG_8411i.JPG IMG_8411j.JPG IMG_8411k.JPG IMG_8411l.JPG IMG_8411m.JPG IMG_8411n.JPG IMG_8411o.JPG IMG_8411p.JPG IMG_8411q.JPG IMG_8411r.JPG IMG_8411s.JPG IMG_8411t.JPG IMG_8411u.JPG IMG_8411v.JPG IMG_8411w.JPG IMG_8411x.JPG IMG_8411y.JPG IMG_8411z.JPG IMG_8411za.JPG IMG_8411zb.JPG IMG_8411zc.JPG IMG_8411zd.JPG IMG_8411ze.JPG IMG_8411zf.JPG IMG_8411zg.JPG IMG_8411zh.JPG IMG_8411zi.JPG IMG_8411zj.JPG IMG_8411zk.JPG IMG_8411zl.JPG IMG_8411zm.JPG IMG_8411zn.JPG IMG_8411zo.JPG IMG_8411zp.JPG IMG_8411zq.JPG IMG_8411zr.JPG IMG_8411zs.JPG IMG_8411zt.JPG IMG_8411zu.JPG IMG_8411zv.JPG IMG_8411zw.JPG IMG_8411zx.JPG IMG_8411zy.JPG IMG_8411zz.JPG IMG_8411zza.JPG IMG_8411zzb.JPG IMG_8411zzc.JPG IMG_8411zzd.JPG IMG_8411zze.JPG IMG_8411zzf.JPG IMG_8411zzg.JPG IMG_8411zzh.JPG IMG_8411zzi.JPG IMG_8411zzj.JPG IMG_8411zzk.JPG IMG_8411zzl.JPG IMG_8411zzm.JPG IMG_8411zzn.JPG IMG_8411zzo.JPG IMG_8411zzp.JPG IMG_8411zzq.JPG IMG_8411zzr.JPG IMG_8411zzs.JPG IMG_8411zzt.JPG IMG_8411zzu.JPG IMG_8411zzv.JPG IMG_8411zzw.JPG IMG_8411zzx.JPG IMG_8411zzy.JPG IMG_8411zzz.JPG IMG_8411zzza.JPG IMG_8411zzzb.JPG IMG_8411zzzc.JPG IMG_8411zzzd.JPG IMG_8411zzze.JPG IMG_8411zzzf.JPG IMG_8411zzzg.JPG IMG_8411zzzh.JPG IMG_8413.JPG IMG_8414.JPG IMG_8415.JPG IMG_8416.JPG IMG_8417.JPG IMG_8418.JPG IMG_8419.JPG IMG_8420.JPG IMG_8421.JPG IMG_8422.JPG IMG_8423.JPG IMG_8424.JPG IMG_8425.JPG IMG_8426.JPG IMG_8427.JPG IMG_8428.JPG IMG_8429.JPG IMG_8430.JPG IMG_8431.JPG IMG_8432.JPG IMG_8433.JPG IMG_8434.JPG IMG_8435.JPG IMG_8446.JPG IMG_8447.JPG IMG_8448.JPG IMG_8449.JPG IMG_8450.JPG IMG_8451.JPG IMG_8452.JPG IMG_8453.JPG IMG_8454.JPG IMG_8455.JPG IMG_8456.JPG IMG_8457.JPG IMG_8505.JPG IMG_8506.JPG IMG_8507.JPG IMG_8508.JPG IMG_8509.JPG IMG_8510.JPG IMG_8511.JPG IMG_8512.JPG IMG_8513.JPG IMG_8514.JPG IMG_8515.JPG IMG_8516.JPG IMG_8517.JPG IMG_8518.JPG IMG_8519.JPG IMG_8520.JPG IMG_8521.JPG IMG_8522.JPG IMG_8523.JPG IMG_8525.JPG IMG_8526.JPG IMG_8527.JPG IMG_8528.JPG IMG_8529.JPG IMG_8530.JPG IMG_8531.JPG IMG_8534.JPG IMG_8535.JPG IMG_8536.JPG IMG_8537.JPG IMG_8538.JPG IMG_8539.JPG IMG_8540.JPG IMG_8541.JPG IMG_8542.JPG IMG_8543.JPG IMG_8544.JPG IMG_8545.JPG IMG_8546.JPG IMG_8547.JPG IMG_8548.JPG IMG_8549.JPG IMG_8550.JPG IMG_8551.JPG IMG_8552.JPG IMG_8553.JPG IMG_8554.JPG IMG_8555.JPG IMG_8556.JPG IMG_8557.JPG IMG_8558.JPG IMG_8559.JPG IMG_8560.JPG IMG_8561.JPG IMG_8562.JPG 2008-2009: folder corresponding to the breeding season 2008-2009 List of the photographs from the easternmost to the westermost part of the colony IMG_3135.JPG IMG_3136.JPG IMG_3137.JPG IMG_3138.JPG IMG_3139.JPG IMG_3140.JPG IMG_3141.JPG IMG_3142.JPG IMG_3143.JPG IMG_3144.JPG IMG_3147.JPG IMG_3148.JPG IMG_3149.JPG IMG_3150.JPG IMG_3151.JPG IMG_3152.JPG IMG_3153.JPG IMG_3154.JPG IMG_3155.JPG IMG_3156.JPG IMG_3157.JPG IMG_3158.JPG IMG_3159.JPG IMG_3160.JPG IMG_3161.JPG IMG_3162.JPG IMG_3163.JPG IMG_3165.JPG IMG_3166.JPG IMG_3167.JPG IMG_3168.JPG IMG_3169.JPG IMG_3170.JPG IMG_3171.JPG IMG_3172.JPG IMG_3173.JPG IMG_3174.JPG IMG_3175.JPG IMG_3176.JPG IMG_3177.JPG IMG_3178.JPG IMG_3179.JPG IMG_3180.JPG IMG_3181.JPG IMG_3182.JPG IMG_3183.JPG IMG_3184.JPG IMG_3185.JPG IMG_3186.JPG IMG_3187.JPG IMG_3188.JPG IMG_3189.JPG IMG_3190.JPG IMG_3191.JPG IMG_3192.JPG IMG_3193.JPG IMG_3194.JPG IMG_3200.JPG IMG_3201.JPG IMG_3202.JPG IMG_3203.JPG IMG_3204.JPG IMG_3205.JPG IMG_3206.JPG IMG_3207.JPG IMG_3208.JPG IMG_3209.JPG IMG_3210.JPG IMG_3211.JPG IMG_3214.JPG IMG_3215.JPG IMG_3216.JPG IMG_3217.JPG IMG_3218.JPG IMG_3219.JPG IMG_3220.JPG IMG_3221.JPG IMG_3222.JPG IMG_3223.JPG IMG_3224.JPG IMG_3225.JPG IMG_3226.JPG IMG_3227.JPG IMG_3228.JPG IMG_3229.JPG IMG_3230.JPG IMG_3231.JPG IMG_3232.JPG IMG_3233.JPG IMG_3234.JPG IMG_3235.JPG IMG_3236.JPG IMG_3237.JPG IMG_3238.JPG IMG_3239.JPG IMG_3240.JPG IMG_3241.JPG IMG_3242.JPG IMG_3243.JPG IMG_3244.JPG IMG_3245.JPG IMG_3246.JPG IMG_3247.JPG IMG_3248.JPG IMG_3249.JPG IMG_3250.JPG IMG_3251.JPG IMG_3252.JPG IMG_3253.JPG IMG_3254.JPG IMG_3255.JPG IMG_3256.JPG IMG_3257.JPG IMG_3258.JPG IMG_3259.JPG IMG_3260.JPG IMG_3261.JPG IMG_3262.JPG IMG_3263.JPG IMG_3264.JPG IMG_3265.JPG IMG_3266.JPG IMG_3267.JPG IMG_3268.JPG IMG_3269.JPG IMG_3270.JPG IMG_3271.JPG IMG_3272.JPG IMG_3273.JPG IMG_3274.JPG IMG_3275.JPG IMG_3276.JPG IMG_3277.JPG IMG_3278.JPG IMG_3279.JPG IMG_3280.JPG IMG_3281.JPG IMG_3282.JPG IMG_3283.JPG IMG_3284.JPG IMG_3285.JPG IMG_3286.JPG IMG_3287.JPG IMG_3288.JPG IMG_3289.JPG IMG_3290.JPG IMG_3291.JPG IMG_3292.JPG IMG_3293.JPG IMG_3294.JPG IMG_3295.JPG IMG_3296.JPG IMG_3297.JPG IMG_3298.JPG IMG_3299.JPG IMG_3300.JPG IMG_3301.JPG IMG_3302.JPG IMG_3303.JPG IMG_3304.JPG IMG_3305.JPG IMG_3306.JPG IMG_3307.JPG IMG_3308.JPG IMG_3309.JPG IMG_3310.JPG IMG_3311.JPG IMG_3312.JPG IMG_3313.JPG IMG_3314.JPG IMG_3315.JPG IMG_3316.JPG IMG_3317.JPG IMG_3318.JPG IMG_3319.JPG IMG_3320.JPG IMG_3321.JPG IMG_3322.JPG IMG_3323.JPG IMG_3324.JPG IMG_3325.JPG IMG_3326.JPG IMG_3327.JPG IMG_3328.JPG IMG_3329.JPG IMG_3330.JPG IMG_3331.JPG IMG_3332.JPG IMG_3333.JPG IMG_3334.JPG IMG_3335.JPG IMG_3336.JPG IMG_3337.JPG IMG_3338.JPG IMG_3339.JPG IMG_3340.JPG IMG_3341.JPG IMG_3342.JPG IMG_3343.JPG IMG_3344.JPG IMG_3345.JPG IMG_3346.JPG IMG_3347.JPG IMG_3348.JPG IMG_3349.JPG IMG_3350.JPG IMG_3351.JPG IMG_3352.JPG IMG_3353.JPG IMG_3354.JPG IMG_3355.JPG IMG_3356.JPG IMG_3357.JPG IMG_3358.JPG IMG_3359.JPG IMG_3360.JPG IMG_3361.JPG IMG_3362.JPG IMG_3363.JPG IMG_3364.JPG IMG_3365.JPG IMG_3366.JPG IMG_3367.JPG IMG_3368.JPG IMG_3369.JPG IMG_3370.JPG IMG_3371.JPG IMG_3372.JPG IMG_3373.JPG IMG_3374.JPG IMG_3375.JPG IMG_3376.JPG IMG_3377.JPG IMG_3378.JPG IMG_3379.JPG IMG_3380.JPG IMG_3381.JPG IMG_3382.JPG IMG_3383.JPG IMG_3384.JPG IMG_3385.JPG IMG_3386.JPG IMG_3387.JPG IMG_3388.JPG IMG_3389.JPG IMG_3390.JPG IMG_3391.JPG IMG_3392.JPG IMG_3393.JPG IMG_3394.JPG IMG_3395.JPG IMG_3396.JPG IMG_3397.JPG IMG_3398.JPG IMG_3399.JPG IMG_3400.JPG IMG_3401.JPG IMG_3402.JPG IMG_3403.JPG IMG_3404.JPG IMG_3405.JPG IMG_3406.JPG IMG_3407.JPG IMG_3408.JPG IMG_3409.JPG IMG_3410.JPG IMG_3411.JPG IMG_3412.JPG IMG_3413.JPG IMG_3414.JPG IMG_3415.JPG IMG_3416.JPG IMG_3417.JPG IMG_3418.JPG IMG_3419.JPG IMG_3420.JPG IMG_3421.JPG IMG_3422.JPG IMG_3423.JPG IMG_3424.JPG IMG_3425.JPG IMG_3426.JPG IMG_3427.JPG IMG_3428.JPG IMG_3429.JPG IMG_3430.JPG IMG_3431.JPG IMG_3432.JPG IMG_3433.JPG IMG_3434.JPG IMG_3435.JPG IMG_3436.JPG IMG_3437.JPG IMG_3438.JPG IMG_3439.JPG IMG_3440.JPG IMG_3441.JPG IMG_3442.JPG IMG_3443.JPG IMG_3444.JPG IMG_3445.JPG IMG_3446.JPG IMG_3447.JPG IMG_3448.JPG IMG_3449.JPG IMG_3450.JPG IMG_3451.JPG IMG_3452.JPG IMG_3453.JPG IMG_3454.JPG IMG_3455.JPG IMG_3456.JPG IMG_3457.JPG IMG_3458.JPG IMG_3459.JPG IMG_3460.JPG IMG_3461.JPG IMG_3462.JPG IMG_3463.JPG IMG_3464.JPG IMG_3465.JPG IMG_3466.JPG IMG_3467.JPG IMG_3468.JPG IMG_3469.JPG IMG_3470.JPG IMG_3471.JPG IMG_3472.JPG IMG_3474.JPG IMG_3475.JPG IMG_3476.JPG IMG_3477.JPG IMG_3478.JPG IMG_3479.JPG IMG_3480.JPG IMG_3481.JPG IMG_3482.JPG IMG_3483.JPG IMG_3484.JPG IMG_3485.JPG IMG_3486.JPG IMG_3487.JPG IMG_3488.JPG IMG_3489.JPG IMG_3490.JPG IMG_3491.JPG IMG_3492.JPG IMG_3493.JPG IMG_3494.JPG IMG_3495.JPG IMG_3496.JPG IMG_3497.JPG IMG_3498.JPG IMG_3499.JPG IMG_3500.JPG IMG_3501.JPG IMG_3502.JPG IMG_3503.JPG IMG_3504.JPG IMG_3505.JPG 2019-2020: folder corresponding to the breeding season 2019-2020 2019-2020\Part 1_BONITA to ESPIGON: subfolder corresponding to the westermost part of the colony between the Bonita and Espigon car accesses List of the photographs from the westermost part of this sector of the colony to its easternmost part IMG_0898.JPG IMG_0899.JPG IMG_0900.JPG IMG_0901.JPG IMG_0904.JPG IMG_0905.JPG IMG_0906.JPG IMG_0907.JPG IMG_0908.JPG IMG_0909.JPG IMG_0910.JPG IMG_0911.JPG IMG_0912.JPG IMG_0913.JPG IMG_0914.JPG IMG_0915.JPG IMG_0916.JPG IMG_0917.JPG IMG_0918.JPG IMG_0919.JPG IMG_0920.JPG IMG_0921.JPG IMG_0923.JPG IMG_0926.JPG IMG_0927.JPG IMG_0928.JPG IMG_0929.JPG IMG_0930.JPG IMG_0931.JPG 2019-2020\Part 2_ESPIGON to 4KM towards the lighthouse: subfolder corresponding to the part of the colony between the Espigon car access and a point 4 km west of the Río Negro lighthouse List of the photographs from the westermost part of this sector of the colony to its easternmost part IMG_0943.JPG IMG_0945.JPG IMG_0946.JPG IMG_0947.JPG IMG_0948.JPG IMG_0950.JPG IMG_0951.JPG IMG_0952.JPG IMG_0953.JPG IMG_0955.JPG IMG_0956.JPG IMG_0958.JPG IMG_0960.JPG IMG_0961.JPG IMG_0962.JPG IMG_0964.JPG IMG_0965.JPG IMG_0966.JPG IMG_0967.JPG IMG_0969.JPG IMG_0970.JPG IMG_0971.JPG IMG_0975.JPG IMG_0976.JPG IMG_0977.JPG IMG_0985.JPG IMG_0986.JPG IMG_0987.JPG IMG_0989.JPG IMG_0990.JPG IMG_0991.JPG 2019-2020\Part 3_4MK from ESPIGON to 4KM to the lighthouse: subfolder corresponding to the part of the colony located 4 km east of the Espigon car access and 4 km west of the Río Negro lighthouse List of the photographs from the westermost part of this sector of the colony to its easternmost part IMG_4273.jpg IMG_4275.jpg IMG_4276.jpg IMG_4277.jpg IMG_4278.jpg IMG_4279.jpg IMG_4280.jpg IMG_4281.jpg IMG_4282.jpg IMG_4283.jpg IMG_4284.jpg IMG_4285.jpg IMG_4286.jpg IMG_4287.jpg IMG_4288.jpg IMG_4289.jpg IMG_4291.jpg IMG_4292.jpg IMG_4293.jpg IMG_4294.jpg IMG_4295.jpg IMG_4296.jpg IMG_4298.jpg IMG_4299.jpg IMG_4300.jpg IMG_4301.jpg IMG_4302.jpg IMG_4303.jpg IMG_4304.jpg IMG_4305.jpg IMG_4306.jpg IMG_4308.jpg IMG_4309.jpg IMG_4310.jpg IMG_4311.jpg IMG_4312.jpg IMG_4313.jpg IMG_4314.jpg IMG_4315.jpg IMG_4317.jpg IMG_4318.jpg IMG_4319.jpg IMG_4320.jpg IMG_4321.jpg IMG_4322.jpg IMG_4323.jpg IMG_4324.jpg IMG_4325.jpg IMG_4326.jpg IMG_4327.jpg IMG_4329.jpg IMG_4330.jpg IMG_4331.jpg IMG_4332.jpg IMG_4333.jpg IMG_4334.jpg IMG_4335.jpg IMG_4337.jpg IMG_4338.jpg IMG_4339.jpg IMG_4340.jpg IMG_4341.jpg IMG_4342.jpg IMG_4343.jpg IMG_4344.jpg IMG_4345.jpg IMG_4347.jpg IMG_4348.jpg IMG_4349.jpg IMG_4350.jpg IMG_4351.jpg IMG_4352.jpg IMG_4353.jpg IMG_4354.jpg IMG_4355.jpg IMG_4356.jpg IMG_4357.jpg IMG_4358.jpg IMG_4359.jpg IMG_4360.jpg IMG_4362.jpg IMG_4363.jpg IMG_4364.jpg IMG_4365.jpg IMG_4366.jpg IMG_4367.jpg IMG_4368.jpg IMG_4369.jpg IMG_4370.jpg IMG_4371.jpg IMG_4372.jpg IMG_4373.jpg IMG_4374.jpg IMG_4375.jpg IMG_4376.jpg IMG_4377.jpg IMG_4378.jpg IMG_4379.jpg IMG_4380.jpg IMG_4381.jpg 2019-2020\Part 4_4KM W of the lighthouse to KM0: subfolder corresponding to the easternmost part of the colony List of the photographs from the westermost part of this sector of the colony to its easternmost part IMG_4387.JPG IMG_4388.JPG IMG_4389.JPG IMG_4390.JPG IMG_4391.JPG IMG_4393.JPG IMG_4394.JPG IMG_4395.JPG IMG_4396.JPG IMG_4398.JPG IMG_4399.JPG IMG_4400.JPG IMG_4401.JPG IMG_4402.JPG IMG_4404.JPG IMG_4405.JPG IMG_4406.JPG IMG_4408.JPG IMG_4409.JPG IMG_4410.JPG IMG_4412.JPG IMG_4413.JPG IMG_4415.JPG IMG_4416.JPG IMG_4417.JPG IMG_4418.JPG IMG_4420.JPG IMG_4421.JPG IMG_4423.JPG IMG_4424.JPG IMG_4426.JPG IMG_4427.JPG IMG_4428.JPG IMG_4430.JPG IMG_4431.JPG IMG_4433.JPG IMG_4434.JPG IMG_4435.JPG IMG_4436.JPG IMG_4438.JPG IMG_4439.JPG IMG_4440.JPG IMG_4441.JPG IMG_4442.JPG IMG_4443.JPG IMG_4445.JPG IMG_4446.JPG IMG_4447.JPG IMG_4448.JPG IMG_4450.JPG IMG_4451.JPG IMG_4452.JPG IMG_4453.JPG IMG_4454.JPG IMG_4455.JPG IMG_4456.JPG IMG_4457.JPG IMG_4458.JPG IMG_4460.JPG IMG_4461.JPG IMG_4462.JPG IMG_4463.JPG IMG_4464.JPG IMG_4465.JPG IMG_4466.JPG ## Code/software Photographs can be opened with an image processing software (e.g. GIMP, versions 2.8 or newer, Spencer Kimball, Peter Mattis, and the GIMP Development Team).