But research by zoological society of london (zsl) and the british trust for ornithology (bto), suggests that bird tables and feeders are spreading illness because they bring species together. The british trust for ornithology (bto) is an organisation founded in 1932 for the study of birds in the british isles the bto also runs its only bird reserve, nunnery lakes reserve, on this site. bird table - for participants in the garden birdwatch project.. A few nails or hooks in the edges of the table will be useful for hanging nut or seed feeders or fat balls. a roof gives some protection to feeding birds (from rain, snow and hunting sparrowhawks). some birds may even roost at night on a table with a roof. it also provides a dry place for seed hoppers and nut containers..
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