Nest Structures for Ducks and Geese
Mallards
Culverts
Culvert structures, as described in the section "Canada Geese - Culverts", are readily used by mallards. However, because geese nest earlier than mallards, they may monopolize these sites. One way to keep part of the culvert available to nesting mallards is to install a wood/wire partition on the top (Figure 6). The partition can be easily constructed using cedar or treated 2 × 6's and 6 × 6 inch welded wire. Although a mallard may be reluctant to use the culvert when a goose is present, the partition will help insure that some nesting cover remains for a hen to use after the goose nest hatches. To provide the overhead cover that nesting mallards desire, grass or willows should be attached to the partition's wire roof for the first year or until natural vegetation begins growing on the culvert. For details on culvert installation, see "Canada Geese - Culverts".
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