A Chattering Lory (Lorius garrulus) was documented by Gan Cheong Weei scraping the sori off the frond (=leaf) of the Rabbit’s-foot Fern (Davellia denticulate) to get at the spores (above).
Sori (singular: sorus) are clusters of spore sacs (sporangia) containing microscopic spores. They come in different shapes and sizes. The image above shows the sori of the Rabbit’s-foot Fern.
The spores, contained within the spore sacs, are ejected into the air when mature, to be swept away by the breeze. The above image, from another fern species, show 7 spore sace that had burst, scattering the many spores inside. When the spores land on a damp spot some distance away, they germinate to eventually give rise to young fern plants. So, spores are equivalent to seeds in flowering plants.
The three video clips (above, below) show the lory scraping the fern sori to get at the spore sacs containing the spores.
Appreciate feedback from anyone with information on birds eating fern spores.
Gan Cheong Weei
4th November 2018