(Scientific American) A new study has found that bumble bees measure gaps they need to pass through by flying side-to-side to scan it. When the gap became narrower than their wingspan, the bees took a longer time to scan the opening. And then they did something remarkable: they turned their bodies to fly through sideways. Some of the bees’ bodies did bump the sides of the narrowed opening – but every one of the 400 recorded flights through the gap was a success.
(Twitter, McArt Lab @McArtLab) “Nice article on how exposure to only 10 ppb clothianidin during honey bee development increases varroa levels by 23%. Lab results and simple population model match field results near seed-treated corn fields” The original paper.
(Bloomberg Law) Insects aren’t specifically protected under the state law. But proponents of listing four bumblebees argued that the pollinators fell under the definition of fish—which are eligible, because they are invertebrates and don’t have backbones. But a tentative ruling issued by the presiding judge sided with agriculture industry groups opposing the listing.
(ScienceDaily, Cell Press) There are over 20,000 species of bees, but accurate data about how these species are spread across the globe are sparse. However, researchers have created a map of bee diversity by combining the most complete global checklist of known bee species with the almost 6 million additional public records of where individual species have appeared around the world. The team’s findings show that there are more species of bees in the Northern Hemisphere than the Southern and more in arid and temperate environments than in the tropics.
(Twitter, Zach Portman @zachportman) “First – what is nectar concentrating? If you’ve ever seen a bee ‘blowing bubbles’ and sitting around with a drop of liquid in its mouthparts, it’s most likely concentrating nectar… In this project, we wanted to figure out just how widespread nectar concentrating behavior is in bees… For part 2 of the project, we’ve decided to move to iNaturalist, and have created a project that you can join and add observation to if you’re interested.” The iNaturalist project.
(Twitter, Vini Brito @viniduartina) “Petals are important to attract buzzing bees and the tactile stimulus of the stamens triggers their buzzing behaviour. Check out the attractive role of floral elements in two Melastomes with pollen flowers!” The original paper.
(Animal Ecology in Focus) The causes underlying the ongoing decline of bumble bees have been much debated, and include habitat loss, pesticides, emerging diseases and climate change. A recent paper evaluates how the combined effects of four common environmental stressors interact to affect bumblebees at the individual and colony levels.
(University of California, Riverside) In a new paper, Hollis Woodard and colleagues lay out the need for an alliance of researchers, environmental organizations and federal entities to monitor native bees throughout the U.S. Supported by a $380,000 grant from the U.S. Department of Agriculture, anyone with the time and inclination can join this first-of-its-kind monitoring network.