Assertion: woodpecker's tree | /r/HasProperty | hollow
Facets:
Source sentences:
text: To fend off any intruders it will use vocalizations and drumming on hollow trees.
text: Woodpeckers choose a surface that resonates, such as a hollow tree, and may use man-made structures such as gutters and downpipes.
text: For a lot of elaborate communication, they drum on resonant objects like hollow trees, stumps and logs, utility poles, chimneys, rain gutters and trash cans, in addition to any object which will echo loudly.
text: Drumming and drilling produce the rapid-fire noise the Woodpecker makes on a reverberating surface, such as a hollow tree, metal street sign, chimney or house siding.
text: Some woodpeckers practice drumming (watch video)—a superfast pecking that attracts mates and defends territory—on a resonant surface, like a hollow tree.