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Thread: Queen pheremones and DCAs

  1. #11
    Senior Member Mellifera Crofter's Avatar
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    Quote Originally Posted by Thymallus View Post
    It depends very much on which species of bumblebee. ...

    ... Suggesting that with no obvious depletions in the horizon the drones are more randomly spread.
    That's interesting - so, these bees don't have a local to head for.

    Thanks also for the information about the bumble bee habits.

    Kitta

  2. #12
    Administrator gavin's Avatar
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    Was reading that section earlier. Yes, the lack of DCAs in flat monotonous landscapes was interesting. Also that DCAs seem to need drones to become stable - too few in the air and they don't accumulate. It isn't clear what it is that holds them together - sight/sound of other drones or maybe even a pheromone, to return to Kitta's question.

  3. #13

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    Like hang gliders there may be a micro version of rising thermals caused by the local geography ?

  4. #14

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    There has to be something, the impression I got from their work in hilly areas was that they could pinpoint direction by "depletions of horizon" but couldn't explain why they stopped and congregated where they did.
    Last edited by Thymallus; 29-01-2017 at 07:09 PM.

  5. #15
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    Quote Originally Posted by The Drone Ranger View Post
    Like hang gliders there may be a micro version of rising thermals caused by the local geography ?
    Rocks or any bare dark ground help generate thermals with some sunlight.

    (I used to fly radio control gliders)

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