Category Archives: Life History

Churchill problem polar bear report for week 3 and a triplet litter of cubs spotted

Courtesy the Town of Churchill:

Also, note that a mother with a litter of triplets spotted along the coast of Wapusk National Park (just east and south of Churchill) in good condition, 15 September 2020 (see photo below). Biologist Nick Lunn falsely claimed in 2018 that no triplet litters had been born in Western Hudson Bay since 1996 – a correction made later claimed Lunn meant there hasn’t been any triplet litters seen in the fall, which was also not true in 2017 or in 2020:

Compare weekly stats above for this year to a few previous years at the second week in September:

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First polar bear alert report for Churchill an astonishing seven weeks later than last year

The first report of the Polar Bear Alert Program in Churchill, Manitoba was released today (1 September), a full seven weeks later than last year due to many bears remaining on the Western Hudson Bay ice much later than they have done in the past.

2020 Aug 31 - Polar Bear Stats_week 1 jpeg

As I mentioned previously, as long as I’ve been collecting these published reports (2015), there has not been a first report of the season issued later than the second week in July, so this year is really unusual and I suspect similar to the 1980s.

I thought it possible that this was a Covid-related delay getting conservation officers to Churchill but as you’ll see above, that appears not to be the case: there simply have been not enough serious problems with bears in Churchill to warrant sending officers out before last week. No information on the general condition of bears was included this year, as it has been in other years (see below).  Activity this last week in August 2020 was similar to the first week in July 2018.

Polar bear Cape East 0 Wakusp NP _24 Aug 2020 earlier

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Amid crying over low Arctic ice, W Hudson Bay polar bears leave ice as late as 2009

This year, the last collared Western Hudson Bay polar bear to leave the ice left as late, or later, than the last collared bear did in 2009 (which was an unusually late breakup year) and so far, all bears spotted have been in good physical condition despite inhabiting one of the most southern regions of the Arctic. All the while, sea ice experts have been hand-wringing about low Arctic sea ice –– in general and as polar bear habitat.

Polar bear Cape East 0 Wakusp NP _24 Aug 2020 earlier

A female with two yearling cubs on the shore of Wakusp National Park, Western Hudson Bay on 24 August 2020. Taken via livecam from almost a mile away.

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Few bears on the ice off Western Hudson Bay at 14 August but will be onshore soon

Polar bear biologist Andrew Derocher published a tracking map of his collared polar bear females that shows one bear (out of 11) still on the rapidly diminishing ice north of Churchill in Western Hudson Bay – and where there is a collared female, there is almost certainly other bears doing the exact same thing:

Derocher 2020 WHB tracking map 14 Aug_1 bear still on the ice

Without evidence to support such a claim, Derocher (below) assumes this collared female is probably hunting seals. In fact, last year he admitted that most bears on Hudson Bay from at least July onward are unlikely to be successfully hunting seals:

Derocher 2020 Aug 14_1 bear still on the ice at 14 Aug odd behaviour

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Many W Hudson Bay polar bears still offshore at 7 August despite apparent low ice levels

Contrary to all expert expectations, five female polar bears (45%) out of eleven that had tracking collars attached last year were still out on the sea ice that’s lingering along the western shore of Hudson Bay as of 7 August. And if five collared bears are out there, then there are almost certainly many more without collars doing the same thing. This pattern of bears staying out on the ice long after the so-called ‘critical threshold’ of 50% concentration has passed has been going on since at least 2015 and many bears on tracking maps in July and August appear to be on ice that doesn’t exist.

Chukchi Sea polar bear Arctic_early August 2018_A Khan NSIDC small

There are two explanations for this pattern and both are likely true: 1) much more ice actually exists on Hudson Bay than satellites can detect and 2) polar bear experts are wrong that Western Hudson Bay polar bears head to land soon after sea ice concentration drops below 50%. Models that predict a catastrophic future for Western Hudson Bay polar bears (Castro de la Guardia et al. 2013; Molnar et al. 2020) assume that ice coverage of less than 50% in summer greatly reduces polar bear survival. However, if polar bears do not always head to land when sea ice drops below 50% then the models cannot possibly describe their future accurately. In other words, depending on the discredited ‘worst case’ RCP8.5 climate scenario for the most recent polar bear survival model that extrapolates from Western Hudson Bay bear data to many other subpopulations, as I discussed previously, may not be its only fault.

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Six good years in a row for the polar bear subpopulation used to predict species demise

In something resembling a new pattern for Western Hudson Bay polar bears, most of the animals are still out on the ice in late July this year, just like they were in the 1980s. The same thing happened last year but was brushed off as a happy anomaly. However, after last fall’s 1980s-like early freeze-up, this makes the sixth year in a row of good to very good sea ice conditions for Western Hudson Bay polar bears. No wonder polar bear experts haven’t published these data: good sea ice conditions along with polar bears coming ashore fat and healthy are not just inconvenient – they threaten to destroy the extinction panic narrative that depends on Western Hudson Bay bears showing evidence of harm from reduced sea ice.

WH 18 Sat July 2020 noon PT Cape East fat mother and cub_Wakusp NP explore dot org livecam

Fat mother and cub onshore at Wakusp National Park, Western Hudson Bay 18 July 2020, one of the first of the season.

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10 fallacies about Arctic sea ice & polar bear survival refute misleading ‘facts’

This updated blog post of mine from last year is as pertinent now as it was then: it’s a fully-referenced rebuttal to the misleading ‘facts’ so often presented this time of year to support the notion that polar bears are being harmed due to lack of summer sea ice. Polar Bears International developed ‘Arctic Sea Ice Day’ (15 July) to promote their skewed interpretation of polar bear science at the height of the Arctic melt season. This year I’ve add a ‘Polar Bears and the Arctic Food Chain‘ graphic, which readers are free to download and share. For further information, see “The Polar Bear Catastrophe That Never Happened“.

Polar bear top of Arctic food chain 7 July 2020

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Hudson Bay sea ice cover at early summer 2020 is similar to the 1980s

Don’t expect to hear this news from polar bear activists busy promoting the supposed threat to polar bears from declining Arctic sea ice but ice cover over Hudson Bay so far this summer has been very similar to what it was in the 1980s – often promoted as ‘the good old days’ for Western Hudson Bay polar bears. As of the end of June 2020, very concentrated ice (9/10-10/10) more than 1 metre thick still covered most of the bay and there was still no open water near Churchill along the west coast down into James Bay.

Hudson Bay weekly concentration 2020 June 29 PNG

Polar bear activists don’t like to have current Hudson Bay sea ice reality ruin their social and news media narrative that ‘polar bears are all gonna die’, so they instead emphasize the obsolete ‘declining trend’ for Western Hudson Bay breakup dates that haven’t been updated since 2015 (e.g. Castro de la Guardia et al. 2017; Lunn et al. 2016). They do this despite the fact their colleagues admit polar bears don’t catch many seals after late June (regardless of sea ice conditions) because it is past the peak spring feeding period (Obbard et al. 2016; Lippold et al. 2019). Like in the 1980s, in 2015 and 2019 some bears stayed on the ice until early August and 2020 is shaping up to be another 1980’s-like summer.

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No early breakup for W Hudson Bay sea ice again this year: polar bears still on the ice

No early breakup of Hudson Bay sea ice again this year: there is still extensive thick first year ice over most of Hudson Bay and all female polar bears fitted with tracking collars in Western Hudson Bay are still on the ice:

W Hudson Bay polar bears still out on the ice that’s packed together by winds. AE Derocher, 12 June 2020

Dercocher June 12 2020 tracking map Hudson Bay

Breakup of Hudson Bay sea ice as it relates to polar bear movement to land has been about the same since 1999 (about 2 weeks earlier than in the 1980s) and this year is shaping up to be no different: there is still no declining trend in date of sea ice breakup in Western Hudson Bay despite repeated predictions of imminent doom. An especially ‘early’ breakup year would have bears ashore before 15 June. Last year (2019) the first WH bear onshore was caught on film 5 July and problem bears were not recorded onshore in Churchill until the 2nd week of July.

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Spring feeding season almost over for polar bears & sea ice becomes less important

Here are ice conditions at the end of May, which signals the near-end of the critical spring feeding period for polar bears. This is because young-of-the-year seals take to the water to feed themselves, leaving only predator-savvy adults and subadults on the ice from some time in June onward (depending on the region).

masie_all_zoom_4km 2020 May 31_Day 152

Spring is the critical feeding period for polar bears (Crockford 2019, 2020; Lippold et al. 2020; Obbard et al. 2016):

“Unexpectedly, body condition of female polar bears from the Barents Sea has increased after 2005, although sea ice has retreated by ∼50% since the late 1990s in the area, and the length of the ice-free season has increased by over 20 weeks between 1979 and 2013. These changes are also accompanied by winter sea ice retreat that is especially pronounced in the Barents Sea compared to other Arctic areas. Despite the declining sea ice in the Barents Sea, polar bears are likely not lacking food as long as sea ice is present during their peak feeding period. Polar bears feed extensively from April to June when ringed seals have pups and are particularly vulnerable to predation, whereas the predation rate during the rest of the year is likely low. [Lippold et al. 2019:988]

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