3 ms·

the paper: https://www.hetnatuurhistorisch.nl/fileadmin/user_upload/documents-nmr/Publicaties/Deinsea/Deinsea_21/Deinsea_21_17_25_2023_Hiemstra_et_al.pdf https

• __MatrixMan__ 3y ago
  The relevant part is in the discussion section towards the end. These nests aren't exclusively made of spikes. Often it's just the roofs, which serve to defend against attack by other birds but which don't have support the nest builder.
  • sitkack 3y ago
    That is amazing. They are using them for their intended purpose, to keep birds away! And those structures look post-modern. Hats off to you birds!