[MCN] Might loss of pollinators affect food supply for wild bears?

[Lance Olsen]

Google AI Overview

Yes, pollinator loss directly impacts food supplies for wild bears. Up to 90% of a bear's diet (such as grizzly and black bears) consists of plant matter like berries, nuts, and fruits. Without pollinators to fertilize these plants, berry yields drop sharply, leaving bears with less natural food heading into winter. [1 <https://www.pollinator.org/pollinator.org/assets/generalFiles/NAPPC-Bear-Fact-Sheet.pdf>, 2 <https://www.fs.usda.gov/wildflowers/pollinators/documents/factsheet_bear.pdf>, 3 <https://thrivabilitymatters.org/declining-bees-global-food-security-nutrition/>, 4 <https://shuksanconservancy.org/projects/pollinators/major-findings-from-heather-meadows-pollinator-research/>, 5 <https://www.facebook.com/thedoctorasky/videos/what-would-happen-if-every-bee-disappearedbees-pollinate-many-crops-and-wild-pla/777822158285092/>]
The connections between pollinator loss and bear diets involve several specific factors:

Fruit and Berry Production: Key foraging items like huckleberries, blueberries, blackberries, and serviceberries rely almost entirely on insect pollinators (like bees and butterflies) to produce fruit. A lack of these native insects means smaller, fewer, or completely barren berry crops. [1 <https://www.youtube.com/watch?v=F1n3AglDTzQ&t=712>, 2 <https://www.youtube.com/watch?v=fq4VV9edomU>, 3 <https://beebettercertified.org/we-need-bees/>, 4 <https://www.fws.gov/initiative/pollinators/pollinators-benefit-agriculture>, 5 <https://thrivabilitymatters.org/declining-bees-global-food-security-nutrition/>]
Nutritional Impact: During the late summer and autumn, bears enter a state of hyperphagia—a period of intense eating where they need to pack on fat reserves for winter hibernation. A scarcity of pollinator-dependent fruits deprives them of essential sugars and antioxidants needed to build these fat stores. [1 <https://www.beyondtoxics.org/blog/2024/07/the-plight-of-bees-and-their-role-in-food-security/>, 2 <https://blog.nwf.org/2025/01/awake-in-winter-how-climate-change-is-disrupting-black-bear-hibernation/>, 3 <https://www.registerguard.com/story/news/environment/2025/09/22/vote-fat-bear-week-katmai-national-park-begins-sept-23/86299166007/>, 4 <https://www.humaneworld.org/en/resources/what-do-about-black-bears>, 5 <https://www.pollinator.org/pollinator.org/assets/generalFiles/NAPPC-Bear-Fact-Sheet.pdf>]
Increased Human-Wildlife Conflict: When wild, pollinator-dependent food sources fail, bears often wander further into human-populated areas—including Cook County, IL, and surrounding rural expanses—in search of accessible, calorie-dense foods like bird feeders, trash, or agricultural crops. [1 <https://www.sciencedirect.com/science/article/abs/pii/S0006320717317093>, 2 <https://www.youtube.com/shorts/XuQXE3NggYE>, 3 <https://forestry.ubc.ca/news/where-the-wild-bees-are-and-arent-impacts-food-supply/>, 4 <https://www.facebook.com/MassWildlife/posts/in-fall-black-bears-fatten-up-for-winter-eating-many-acorns-beech-nuts-and-hicko/2770461523015963/>, 5 <https://portal.ct.gov/deep/news-releases/news-releases---2024/deep-and-audubon-society-urge-residents-to-take-down-birdfeeders-as-bear-activity-increases>]
Direct Consumption: In addition to eating pollinated plants, many bears (such as the Sloth Bear in Asia and Black Bears in North America) eat the pollinators themselves. They frequently consume bee larvae, pupae, and honeycomb for critical proteins and fats. [1 <https://umaine.edu/news/2024/05/black-bear-beekeepers-join-national-fight-to-preserve-pollinators/>, 2 <https://www.lappesbeesupply.com/beekeeping-blog/bears-and-beehives?srsltid=AfmBOoo5k5G6VuH91UVGhDipCN2Ade3AGSEKniHaWZacxGQ8mdRYzz9->, 3 <https://www.pollinator.org/pollinator.org/assets/generalFiles/NAPPC-Bear-Fact-Sheet.pdf>]

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