Some links: 57

Making connections: a roundup of nature stories that have caught my eye recently:

  • GrrlScientist recaps a recent paper by Dan Strickland et al. that looks at the dependency between Gray Jays (Perisoreus canadensis) and conifers like Black Spruce (Picea mariana). The jays cache perishable food items like berries and mealworms, wedging the morsels into cracks in the bark of trees. Spruces supply a natural preservative, retaining the moisture of the stored snacks, that other northern tree species (birches, maples) don’t provide.
  • Rick Wright rereads Ludlow Griscom’s (1890-1959) master’s thesis, revised and enlarged for publication in The Auk in 1922-23 (part 1, part 2). The paper presents a field identification key to ducks of the east coast. In his emphasis on flight characteristics for distinguishing birds at middle- to long-distance, Griscom anticipates the current emphasis on jizz.
  • Sharon Levy summarizes recent research on the relationships between crop-pollinating bees like Apis mellifera and flowering plants in proximity to crop land: hedgerows of trees, introduced weeds, what have you. What may be the key to the bees’ success is the degree of plant diversity, be it native or alien.
  • Maria Dolan reports on the habitat threat to of Vaux’s Swifts (Chaetura vauxi). These west coast birds, like their eastern congeners, Chimney Swifts (C. pelagica), are dependent on old brick chimneys for roosting (historically, they used hollow trees, which have also become scarce as old-growth forest declines). But rickety brick piles, especially those in earthquake zones, are prime candidates for demolition.