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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. MJB

    Do any birds migrate along an arc?

    They have been geotracked crossing directly from NW Africa to Mozambique & Madagascar in SE Africa. Juveniles undertake this migration seprately from the adults two weeks after fledging... MJB
  2. MJB

    Do any birds migrate along an arc?

    No, the endogenous clock doesn't usually relate to avoidance of obstacles. One example is the migration of Central European Starlings that initially fly west, usually in flocks, then over central France, make a sharp left dogleg that carries them SSW into Iberia. Another is the migratory divide...
  3. MJB

    Do any birds migrate along an arc?

    From viewing many mapped geo-tracked routes taken by migrants, particularly those that cross much of the eastern Palearctic, I get the overall impression** that Great Circle routes are generally followed (Just looking at a single track can be misleading due to positional uncertainties inherent...