Sitta carolinensis
Courtesy US FWS
David Brenzinski, Photographer
Courtesy US FWS
Dave Menke, Photographer
Sitta pygmaea
Courtesy US FWS
Lee Karney, Photographer
If you observe them as they search the main stem of a tree, my inverted woodpecker title will be justified. Rather than moving from top to bottom of the tree facing up as do the woodpeckers, the nut hatch prefers head down from top to bottom. They also like hanging upside down on a horizontal limb. Why? Evolution keeps us mysteries well-guarded. I conjecture partitioning might be part of the answer: a phenomenon where bird species will utilize different parts of the tree to avoid competing for resources with other species.
As with all of life, I pay attention to how our shifting climate has been observed or predicted to affect their populations and distribution. As long as there are conifers breeding season, nut hatches are content. They can be found in dry Ponderosa pine foothills, in moist boreal bogs, around tree line in the mountains, and even in planted Christmas tree plantations. Audubon’s seven-year generated climate model shows an overall northward drift of the species’ range with more disruption and range loss in summer than in winter. The nut hatch is a habitat generalist in winter, so summertime climate is the chief concern going forward. However, whether the species adapts in the decades ahead will be determined in large part by the conifer forest health in a changing climate. The projection for species range change from 2000 to 2080 is 19% of summer 2000 range remaining stable and 58% of winter range projected to be stable. It’s my plan to follow them wherever they may go.
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This is Jack Green, reading and getting wilder about Utah as days pass.
Credits:
Pictures: Courtesy US FWS, David Brenzinski, Photographer
Contains Sound: Courtesy Kevin Colver
Text: Jack Greene, Bridgerland Audubon Society //Utah State University Sustainability
Additional Reading:
White-breasted Nuthatch, All About Birds, Cornell Lab of Ornithology, https://www.allaboutbirds.org/guide/White-breasted_Nuthatch/id
Red-breasted Nuthatch, All About Birds, Cornell Lab of Ornithology, https://www.allaboutbirds.org/guide/Red-breasted_Nuthatch/id
Pygmy Nuthatch, All About Birds, Cornell Lab of Ornithology, https://www.allaboutbirds.org/guide/Pygmy_Nuthatch/id
Red-breasted Nuthatch, Sitta canadensis, eBird, Cornell Lab of Ornithology, https://ebird.org/species/rebnut