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Report observation

Camera trap monitoring

Reference areas for the lynx camera trapping © KORA

The results of the newest camera trap sessions are available below by clicking on the reference areas in the list. Reports of previous sessions can be downloaded as PDF (available in German and/or French). Lynx images of more recent camera trap session are presented in the KORA Monitoring Center.

Comparison of lynx densities in the different reference areas Estimated lynx densities – independent lynx per 100 km² suitable habitat with 95% confidence interval – of the newest sessions in the reference areas in the compartments. The densities are sorted in descending order.

Comp.Reference areaWinterDensity95% CI
IVaSimme-Saane2020/20214.844.05-5.62
IVcNorth of the Rhone2018/20193.292.55-4.03
IVbEastern Bernese Oberland2019/20203.132.62-3.64
IaSouthern Jura2020/20212.962.29-3.63
IbNorthern Jura2018/20192.551.91-3.19
IINorth-eastern Switzerland2017/20182.531.94-3.13
IIIbMid-Central Switzerland2019/20202.191.81-2.58
VcSurselva2020/20211.30.81-1.79
IIIaWestern Central Switzerland2020/20210.860.82-0.9
IVeUpper Valais2019/20200.27
IVdSouthern Lower Valais2018/20190

Reference areas

Ia Jura Süd

Most recent session: 20.11.2020-19.01.2021

949 km², 76 locations with 152 camera traps.

Reference area Southern Jura 20.11.2020-19.01.2021 776 km², 76 locations with 152 camera traps. The camera traps at the 76 locations operated during 4,471 of the 4,560 potentially possible capture nights (98%). With 131 events at 42 locations, 21 independent lynx and 3 juveniles from at least 2 litters were pictured. The capture-recapture estimate of abundance (95% confidence interval) under Model Mh was 23(22 -35) independent lynx, which corresponds to a density of 2.96 (2.29-3.63) independent lynx per 100 km² of suitable habitat. The estimated density did not change in comparaison to the value estimated in 2017/2018.

Sessions:

Sessions within the former reference area Central Jura:

Ib Jura Nord

Most recent session: 05.12.2018–03.02.2019 (DE, FR)

882 km², 61 locations with 122 camera traps.

The camera traps at the 61 locations operated during 3,607 of the potentially possible 3,660 capture nights (98.6%). With 85 events at 42 locations, 14 independent lynx and one juvenile were recorded. The capture-recapture estimate of abundance (95% confidence interval) under model Mh was 16 (15–24) independent lynx, which corresponds to a density of 2.55 (1.91–3.19) per 100 km² suitable habitat. The estimated density did not change significantly in comparison to the value estimated in 2014/15.

Sessions:

II Nordostschweiz

Most recent session: 01.12.2017–30.01.2018

932 km², 70 locations with 140 camera traps.

The camera traps at the 70 locations operated during 3,963 of the potentially possible 4,200 capture nights (94.4%). With 94 events at 36 locations, 17 independent lynx and 8–10 juveniles from at least 5 litters were pictured. The capture-recapture estimate of abundance (95% confidence interval) under Model h was 20 (18–29) independent lynx, which corresponds to a density of 2.53 (1.94 -3.13) independent lynx per 100 km² of suitable habitat. The estimated density did not change significantly in comparison to the value estimated in 2014/15.

Sessions:

IIIa Zentralschweiz West

Most recent session: 05.02.2021-06.04.2021

951 km², 76 locations with 152 camera traps.

The camera traps at the 76 locations operated during 4,242 of the 4,440 potentially possible capture nights (95.5%). With 57 events at 19 locations, 7 independent lynx and 2 juveniles from at least 2 litters were pictured. The capture-recapture estimate of abundance (95% confidence interval) under Model Mh was 7(7 -7) independent lynx, which corresponds to a density of 0.86(0.82 -0.9) independent lynx per 100 km² of suitable habitat. The estimated density is significantly lower than the value estimated in the last session (2018/2019).

Sessions:

IIIb Zentralschweiz Mitte

Most recent session: 05.12.2019–03.02.2020

1’051 km², 59 locations with 118 camera traps.

The camera traps at the 59 locations operated during 3,519 of the potentially possible 3,540 capture nights (99.4%). With 112 events at 42 locations, 16 independent lynx and 7–9 juveniles from at least 2 litters were pictured. The capture-recapture estimate of abundance (95% confidence interval) under model Mh was 16 (16–16) independent lynx, which corresponds to a density of 2.19 (1.81–2.58) independent lynx per 100 km² of suitable habitat. The estimated density did not change significantly in comparison to the value estimated in 2016/17.

Sessions:

IVa Simme-Saane

Most recent session: 01.12.2020-30.01.2021 (DE, FR)

1,135 km², 79 locations with 158 camera traps.

The camera traps at the 79 locations operated during 4,690 of the potentially possible 4,740 capture The camera traps at the 79 locations operated during 4,733 of the 4,740 potentially possible capture nights (99.9%). With 332 events at 66 locations, 46 independent lynx and 10-12 juveniles from at least 8 litters were pictured. The capture-recapture estimate of abundance (95% confidence interval) under Model Mh was 52 (48-67) independent lynx, which corresponds to a density of 4.84 (4.05 -5.62) independent lynx per 100 km² of suitable habitat. The estimated density is significantly higher than the value estimated in the last session (2017/2018).

Sessions:

  • Winter 2007/2008: KORA Bericht Nr. 42 (DE, FR)
  • Winter 2009/2010: KORA Bericht Nr. 52 (DE, FR)
  • Winter 2011/2012: KORA Bericht Nr. 57 (DE, FR)
  • Winter 2013/2014: KORA Bericht Nr. 64 (DE, FR)
  • Winter 2015/2016: KORA Bericht Nr. 74 (DE, FR)
  • Winter 2017/2018: KORA Bericht Nr. 82 (DE, FR)
  • Winter 2020/2021: KORA Bericht Nr. 103 (DE, FR)

IVb Berner Oberland Ost

Most recent session: 13.12.2019–11.02.2020

689 km², 47 locations with 94 camera traps.

The camera traps at the 47 locations operated during 2,754 of the potentially possible 2,820 capture nights (97.7%). With 155 events at 37 locations, 17 independent lynx and 4 juveniles from 4 litters were pictured. The capture-recapture estimate of abundance (95% confidence interval) under Model Mth was 18 (18–25) independent lynx, which corresponds to a density of 3.13 (2.62–3.64) independent lynx per 100 km² of suitable habitat. The estimated density did not change significantly in comparison to the value estimated in 2016/17.

Sessions:

IVc Rhone-Nord

Camera trap monitoring in the K-IVc north of the Rhone 2018/19. Reference area = blue line (1,150 km²). The circles with a point are camera trap locations where lynx were pictured in the Valais part (orange line, 531 km²), empty circles are locations without lynx pictures. The coloured polygons summarise locations with pictures of the same lynx. Black lines delineate sub-compartment boundaries. Grey lines illustrate the canton boundaries. Settlement Areas are shown in orange.

Most recent session (Valais part): 15.02.2019–16.04.2019

VS: 531 km², 23 locations with 46 Camera traps.

The reference area north of the Rhone IVc includes parts of the cantons BE, FR and VD. The canton of Valais did not participate in the session in the winter 2017/18 for political reasons. However, the Valais part was monitored one year later. The camera traps at the 23 sites operated during 1,356 of the potentially possible 1,380 capture nights (98.3%). With 56 events at 13 locations, 8 independent lynx and 2–3 juveniles from at least one litter were pictured in the Valais part.

The lynx pictures collected in the Valais part were combined with the pictures collected in the Vaud, Berne and Fribourg part in the previous winter to estimate the abundance and density of lynx in the reference area north of the Rhone. The capture-recapture estimate of abundance (95% confidence interval) under model Mh was 27 (26–43) independent lynx, which corresponds to a density of 3.29 (2.55–4.03) independent lynx per 100 km² of suitable habitat.

Sessions:

IVd Unterwallis-Süd

Chance observations collected in the lower Valais during the period 01.01.2019–07.06.2019 classified according to the SCALP categories. Red = “hard facts” (C1), blue = observations confirmed by trained people (C2) and green = all observations which have not been confirmed and all observations which cannot be verified (C3) such as direct observations, scats or calls. Reference area = blue line. Black lines delineate sub-compartment boundaries. Grey lines illustrate the canton boundaries. Settlement areas are shown in orange. © KORA/GIS

Most recent session: 27.02.2019–28.04.2019

1,764 km², 66 locations with 132 camera traps.

The camera traps at the 66 locations operated during 3,876 of the potentially possible 3,960 capture nights (97.9%). No lynx were detected during this session. The abundance was zero independent lynx, which corresponds to a density of zero independent lynx per 100 km² of suitable habitat. This is the lowest recorded lynx density in Switzerland and is significantly lower than the estimates in the other reference areas. It should be noted however, that some chance lynx observations were recorded in the reference area southern Lower Valais during the first half of 2019, although none of them was a “hard fact” (C1). Hence, we cannot rule out that one lynx, especially a dispersing individual, was present in the reference area during the survey. We can, however, certainly conclude that the lynx density in the reference area southern Lower Valais is extremely low.

Sessions:

Winter 2018/2019: KORA Bericht Nr. 89

IVe Oberwallis

Most recent session: 19.02.2020–19.04.2020

1,975 km², 73 locations with 146 camera traps.

The camera traps at the 73 locations operated during 4,250 of the potentially possible 4,380 capture nights (97%). With 6 events at 4 locations, 2 independent lynx were recorded. This sample is too small to estimate the number of lynx by means of capture-recapture models. In addition to the sites equipped with camera-traps as part of the deterministic lynx monitoring, the Hunting, Fishing and Wildlife Service of the canton of Valais (DJFW) has installed several infrared flash camera-traps in the frame of the wolf monitoring. The lynx B785 was photographed on one of the sites three times. Thus, at least three different independent lynx were present in the reference area during the entire session, which corresponds to a minimum density of 0.27 independent lynx per 100 km2 of suitable habitat.

Sessions:

Vc Surselva

Most recent session: 18.02.2021-19.04.2021

1,438 km², 76 locations with 152 camera traps

The camera traps at the 76 locations operated during 4,620 of the 4,508 potentially possible capture nights (97.6%). With 102 events at 34 locations, 14 independent lynx and 5-6 juveniles from at least 4 litters were pictured. The capture-recapture estimate of abundance (95% confidence interval) under Model Mh was 15 (15-33) independent lynx, which corresponds to a density of 1.3 (0.81-1.79) independent lynx per 100 km² of suitable habitat. This is the first density estimate for this reference area.

Sessions:

Reference area Surselva (blue polygon) with the spatial distribution of lynxes (Minimum Convex Polygon + buffer zone) photographed during the whole deterministic session. Blue: male (1.4 km buffer zone), pink: female (1.2 km), black: unknown sex (1 km). White circles with a black dot: sites where at least one independent lynx photo was taken; white circles with a red dot: sites where at least one lynx photo was taken, but the individual could not be identified with certainty; white circles: no lynx photo.

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