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Ground-nesting Insects could use Visual Tracking for Monitoring Nest Position during Learning Flights

Samet, Nermin and Zeil, Jochen and Boeddeker, Norbert and Stürzl, Wolfgang (2014) Ground-nesting Insects could use Visual Tracking for Monitoring Nest Position during Learning Flights. Lecture Notes in Computer Science, 8575. Springer. ISSN 0302-9743

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Ants, bees and wasps are central place foragers. They leave their nests to forage and routinely return to their home-base. Most are guided by memories of the visual panorama and the visual appearance of the local nest environment when pinpointing their nest. These memories are acquired during highly structured learning walks or flights that are performed when leaving the nest for the first time or whenever the insects had difficulties finding the nest during their previous return. Ground-nesting bees and wasps perform such learning flights daily when they depart for the first time. During these flights, the insects turn back to face the nest entrance and subsequently back away from the nest while flying along ever increasing arcs that are centred on the nest. Flying along these arcs, the insects counter-turn in such a way that the nest entrance is always seen in the frontal visual field at slightly lateral positions. Here we asked how the insects may achieve keeping track of the nest entrance location given that it is a small, inconspicuous hole in the ground, surrounded by complex natural structures that undergo unpredictable perspective transformations as the insect pivots around the area and gains distance from it. We reconstructed the natural visual scene experienced by wasps and bees during their learning flights and applied a number of template-based tracking methods to these image sequences. We find that tracking with a fixed template fails very quickly in the course of a learning flight, but that continuously updating the template allowed us to reliably estimate nest direction in reconstructed image sequences. This is true even for later sections of learning flights when the insects are so far away from the nest that they cannot resolve the nest entrance as a visual feature. We discuss why visual goal-anchoring is likely to be important during the acquisition of visual-spatial memories and describe experiments to test whether insects indeed update nest-related templates during their learning flights.

Item URL in elib:https://elib.dlr.de/93459/
Document Type:Article
Title:Ground-nesting Insects could use Visual Tracking for Monitoring Nest Position during Learning Flights
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Samet, NerminDepartment of Computer Engineering, Bilkent University, TurkeyUNSPECIFIED
Zeil, Jochenjochen.zeil (at) anu.edu.auUNSPECIFIED
Boeddeker, Norbertnorbert.boeddeker (at) uni-bielefeld.deUNSPECIFIED
Stürzl, Wolfgangwolfgang.stuerzl (at) dlr.deUNSPECIFIED
Journal or Publication Title:Lecture Notes in Computer Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Insect navigation, visual tracking, learning flights, homing
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Vorhaben Multisensorielle Weltmodellierung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics (since 2013) > Perception and Cognition
Deposited By: Stürzl, Wolfgang
Deposited On:07 Jan 2015 14:08
Last Modified:06 Sep 2019 15:22

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