Providing Nesting Cover for Wild Grey Partridges
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Fact sheet 2 Providing nesting cover for wild The Game & Wildlife grey partridges Conservation Trust Grey partridges form pairs in late winter early as the end of April, although mid-May is For over 75 years our scientists have been researching why species like the following the break-up of their winter covey. usual for most hens. Hens lay between 10 and grey partridge, water vole, corn bunting Pair formation usually depends on the weather 20 eggs (average 15 eggs per clutch) at one and black grouse have declined. We are and during cold weather in late winter a ‘covey’ to two-day intervals. No other wild bird lays continually developing practical measures can reform for a short while. In some years, more eggs than a grey partridge! Incubation to reverse these declines. pairs form as early as mid-January. The birds takes 23-25 days and the chicks leave the nest are always monogamous and in the spring the within hours of hatching. Our aim is simple - a thriving countryside hen seeks out suitable cover in which to nest. The hen is on her nest for between 38 rich in game and other wildlife. The nest is made on the ground and and 55 days. At this time she is vulnerable to is usually a scrape lined with grasses. Such a range of predators and to the nest being We are an independent charity reliant on voluntary donations and the support scrapes can be found before the end of flooded during heavy rain. The choice of a of people who care about the survival of March. The first eggs are laid a few weeks later. good nest site is vital if she is to survive this our natural heritage. The incubation of first clutches can begin as crucial period and hatch off her chicks. What do grey partridge hens look for? Why should you read Hens nest in thick grassy cover, typically and die. Many nest sites are therefore this fact sheet? found at the base of a field boundary on south-facing slopes or banks, on free- (hedgerow, fence line, etc), on low banks or draining soils sheltered from the prevailing This series of fact sheets explains how in the crops themselves, particularly when wet weather. Research has shown that sites to restore grey partridges on your farm, suitable non-crop sites are not available. on a bank and surrounded by dead grass based on the results of our practical Research has shown that the two crucial are more likely to be selected for nesting, research. Restoring these birds on elements of a successful nest site are the and that these nests are less likely to be farmland will help us to achieve amount of residual dead grass present and predated and more likely to hatch a brood Biodiversity Action Plan (BAP) targets for this and other BAP species, including the height of the nest above the general than sites or nests on level ground (Figure other ground-nesting birds and rare arable field level. In wet weather, nests on banks 1). Hedges with more than 10 trees per wildflowers. It will also allow you to achieve drain more freely and are less likely to kilometre of hedge are avoided because the best out of your wild gamebirds. become water-logged. Water-logged nests they contain too many look-out posts for are abandoned and the eggs chill quickly birds of prey, crows and magpies. Figure 1 The effect of dead grass on the probability of a random site being selected for nesting, and on the probability of a clutch avoiding predation. Contact Game & Wildlife ConservationTrust 1.0 brood hatching Fordingbridge, Hampshire, SP6 1EF site being selected 0.8 Tel: 01425 652381, Fax: 01425 655848 Scottish HQ tel: 01828 650543 0.6 Email: [email protected] 0.4 www.gwct.org.uk Probability 0.2 0 0 1 2 3 4 Amount of dead grass in nesting cover, ranked www.gwct.org.uk Creating nest cover for grey partridges If you still have strips of perennial grassy Cut the hedge so it grows out and and sow it with a perennial tussocky grass cover at the edges of fields (up to shades out the grassy bottom. mixture. Do not connect the beetle bank two metres wide ideally), please look Cut the perennial grassy cover at the to the existing field boundaries at either after them. This can be done by regular base of your margins every year. end because this will encourage predators maintenance and following the advice to patrol along the edge of your beetle below on dos and don’ts, many of which If you have lost these grassy strips and you bank. Establishing and managing beetle are part of cross-compliance. want them back, consider the following: banks is the same as for a grass margin. As Avoid regular annual cutting of grassy Sow them (at least one metre wide) beetle banks, these strips are grant-aided margins to allow the correct grass structure next to field boundaries and short under both ELS and HLS in England, and to develop. Rotational trimming every two thick hedgerows. the SRDP in Scotland. or three years may be necessary to avoid Use a high proportion of tussocky scrub encroachment, especially if blackthorn perennial grasses, such as cock’s-foot. How much nesting cover is needed? is present, but always leave some margins Newly sown strips should be cut up to To stabilise the population of wild grey uncut in any given year across the farm. three times in year one to discourage partridges (ie. to achieve the first BAP Strive to maintain the competitive, weeds, but thereafter only every three target of halting the decline) without perennial, non-invasive grasses eg. cock’s- years to allow the tussocks to form. predator control, you will need 4.3 foot, and keep out weeds such as cleavers kilometres of nesting cover per square and barren brome. These grassy strips can be created as either kilometre of farm (seven miles/square mile two, four or six metre strips under Entry or four miles/1,000 acres). Do Level Stewardship (ELS) and Higher Level To recover the population to the Keep all agrochemicals in the field. Stewardship (HLS) in England. In Scotland, 2010 BAP target (90,000 pairs in the Fence livestock out of hedge bottoms. a number of options with the potential UK) without predator control, you will Keep the plough at least one metre to help grey partridges exist within the need 6.9 kilometres of nesting cover away from the edge of the hedge. Scottish Rural Development Programme per square kilometre of farm (11 miles/ Create a hedge cutting plan. (SRDP) Tier 111, and within SRDP Tier square mile or seven miles/1,000 acres) 11 land management options. For specific to achieve this target. You also need 5% of Don’t advice, please consult your local advisor your arable area to be managed as insect- Spray herbicides into hedge bottoms. (see details below). rich brood-rearing habitat (conservation Let herbicides drift into hedge bottoms. headlands, wild bird seed mixes, wild bird Misplace fertiliser so it is dumped into Beetle banks. These are raised grass cover on set-aside, etc (see Fact sheet 3)). hedge bottoms. strips sown across (not around) arable Remember to try and site your nesting Plough so close to the hedge that the fields. Raise up a bank across the centre cover close to some insect-rich brood- grass strip disappears. of large fields (more than 16 hectares) by rearing cover to maximise the benefits Let livestock graze hedge bottoms. ploughing in a furrow from each direction from both. Good nesting cover More information The Game & Wildlife Conservation Trust’s Advisory Service can provide further advice on feeding systems for gamebirds, and on all aspects of game management. For information, please contact 01425 651013. No reproduction without permission. All rights reserved. © Game & Wildlife Conservation Trust, 2009 (formerly The Game Conservancy Trust). Registered charity no. 1112023..