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. 2009 Sep 23;276(1677):4373–4380. doi: 10.1098/rspb.2009.1244

Figure 1.

Figure 1.

Two-chamber nest. Chamber 1 is separated for scanning purposes into two regions by a dividing line drawn on the acetate, perpendicular to the long chamber walls and positioned through the centroid of the brood area. This does not correspond to a physical barrier. Chamber 2 has a trapdoor in the acetate cover, allowing access for adding brood. Corridors 1.5 mm wide. Stars denote reader locations.