No direct translation, it seems...

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Note added at 2003-07-07 10:19:13 (GMT)
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http://www.ticino.com/usr/sevac2/pages/sm_quarta02/roccolo/r...

Il roccolo è una specie di torre dove i cacciatori catturavano i tordi e altri tipi di uccelli.

Attorno al roccolo, a semicerchio, piantavano alberi che producono bacche in autunno e cespugli dove mettevano le reti.
Quando gli uccelli passavano di lì, si fermavano a mangiare le bacche. A quel punto i cacciatori lanciavano dalla cima del roccolo una specie di aereoplanino che agli uccelli sembra un falco. Per proteggersi andavano nei cespugli a nascondersi, e così si impigliavano nelle reti.
Dentro il roccolo, al piano terra, c\'erano reti, scope, gabbie e una scala; al primo piano un letto e un tavolo con attrezzi da cucina e al secondo un camino, due panchine e una finestra da dove lanciavano quella specie di finto falco.


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Note added at 2003-07-07 10:24:45 (GMT)
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You can see another \"roccolo\" here:

http://www.parks.it/parco.lura/pun.html

It\'s not a net, but a \'lodge\' (not a shooting lodge, since there is no shooting involved, just nets) where bird-catchers hide and set traps.

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Note added at 2003-07-07 10:26:16 (GMT)
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Nei giardini delle dimore di campagna c\'era sempre il roccolo, un appostamento di uccellagione composto da una struttura vegetale a forma semicircolare o a ferro di cavallo dove venivano poste reti verticali per catturare gli uccelli. Spesso al centro dell\'esedra, veniva costruito un edificio per la sosta dei cacciatori e non, nell\'attesa del passo. Sicché si può far derivare roccolo da rocca in considerazione che esso veniva installato solidamente in posizione elevata.

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Note added at 2003-07-07 10:27:31 (GMT)
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The same site above proposes an English translation:

The Roccolo di Cermenate
The word \"roccolo\" means \"bird snare\", that is a typical structure used by bird hunters; in the past this activity was not practiced with firearms, but with these complex structures. Bird snares can be found above all in the North of Italy, from Piemonte to Veneto, in hilly or mountain areas and along the migratory routes or near possible stops. A bird snare consists of a horseshoe-shaped double row of trees placed towards the valley. Then, a little tower wrapped by climbing plants or by trees which should conceal the structure, is built in order to have a wide view. The hunters place themselves where the openings of the bird snare are situated: then, they launch among the branches an insturment called \"spauracchio\" or \"battarello\", which seems like a bird of prey: its task is to frighten the birds, which get trapped in the nets.
Today this activity is subject to regulations, and the place is particularly charming for the arboreal composition.
Some of these structures (for instance, in Arosio, Pian di Spagna, Intimiano in the province of Como) are used for scientific aims, to capture the birds which are immediately released after their observation.

http://www.parks.it/parco.lura/Epun.html

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Note added at 2003-07-07 10:29:57 (GMT)
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I\'ve seen on the web that in German and French the word \"roccolo\" is kept in Italian, so I would suggest to do the same, putting it between inverted commas and enclosing a translation in parenthesis.

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Note added at 2003-07-07 12:41:34 (GMT)
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For completeness, you could write:

\'roccolo\' (i.e. a bird snare) for fowling

[as you can see from the note I added at 10.27]