Released mallard sometimes have a reputation for a reluctance to leave a pond, but in my experience getting the basics in place can go a long way to preventing this.
An early and essential consideration when sourcing mallard for release is to ensure they come from good stock. This means a strain that flies well and it’s important they have been correctly managed in anticipation of the release process.
As per the Code of Good Shooting Practice, under normal circumstances any birds should be released before the start of their shooting season; 1 September for ducks.
Shooting must not commence until the birds are fully mature and adapted to the wild – a minimum of one month from release. Ducks must always be released into suitable wetland habitat, and in numbers which are appropriate to that habitat’s carrying capacity.
Mallards are generally released from around six weeks onwards, although some people release them slightly older. At this stage their feathers will be well developed, and they should have already transitioned to grain (along with other relevant information, this should be confirmed by your game farm ahead of delivery). Personally, I aim for about eight weeks.
If you are in doubt, it is a good idea to seek guidance from your supplier. Buying growers (the term used for mallard at this age) from a reputable game farm will ensure they have been correctly reared in preparation for release.
In my time as a keeper, I have seen pens partly on land and partly in the water used for release, and in certain situations this approach may still have benefits, but like many others I have released mallard directly on to the water without issues.
Consider if predators such as foxes and mink are present and if so, then relevant control measures need to be undertaken before release.
Depending upon the circumstances (for instance if the mallard will be fed on a bank) the use of an electric fence like one used at a pheasant release pen can be a good idea. It should be multistrand, a bit like one for livestock, and be placed a sufficient distance from the water’s edge to allow mallard to rest and feed.
The process for release is straightforward and consists of placing the crate on the edge of the pond and allowing the ducks to leave and swim onto the pond.
The bank where they are released (and subsequently fed) should be shallow so birds can easily move between the water and land. In some locations there may a suitable island for feeding on, which provides added protection.