Toddlers Toddle, gentle walk of about a mile with fun and sensory games and activities, meet Moorland Discovery Centre, Longshaw, Thursday, May 5, 1.30pm (£2 per child, booking essential, 01433 670368).
The Race to Save the Albatross, illustrated talk by Euan Dunn for Sheffield RSPB Local Group, Central United Refomed Church, Norfolk Street, Thursday, May 5, 7.30pm.
Famous Birdsong Walk at Padley Gorge, to identify resident and summer migrant birds by sight and sound, suitable for most ages but quiet is essential, organised by Sheffield RSPB Local Group, Saturday, meet Grindleford station car park, 8am (2348472).
Composting Bonanza Day, demonstrations and advice from Heeley City Farm and Veolia, special offers on bins and bags of compost, ann’s Grove Primary School, Ann’s Road, Heeley, Saturday, 10am-4pm.
Archaeology in Ecclesall Woods, walk taking in remains from pre-Roman times to the 19th century with Friends of Ecclesall Woods, Saturday, meet Whirlowdale Road bridleway entrance, 10am.
Family Activity Morning, includes pond dipping, bug hunting and make your own insect house, organised by Beauchief Environment Group, for children and adults, Beauchief Abbey ponds, Beauchief Drive, off Abbey Lane, Saturday, 10am-1pm.
Blacka Moor Volunteer Day,helping Sheffield Wildlife Trust to conserve the nature reserve on tasks which vary from footpath improvements and access work to habitat and vegetation management, Saturday, 10am-3pm, meet Stony Ridge car park, Hathersage Road.
Green Forum, energy saving display organised by Emmanuel Church Environment Grou, Crystal Peaks Shopping Mall, Saturday,10am-4pm.
Family Stroll, for all abilities, Sunday, 10.30am, meet Owlthorpe Medical Centre, Moorthorpe Bank, off Moorthorpe Way.
Bluebell Walk, annual stroll with Gleadless Valley Wildlife Trust through the beautiful woods of the valley to identify spring flowers and bird song, Sunday, meet Horse and Groom pub, Blackstock Road, 10.30am.
Five Weirs Walk – The Full Monty, leisurely stroll with the Five Weirs Walk Trust taking in the history, nature and stories, Sunday, 10am, meet Tinsley Supertram stop.
Archives Open Day, for anyone to research family, local and social history relating to the parish, Bradfield Parish Council Offices, Mill Lee Road, Low Bradfield, Sunday, 10am-4pm.
Wortley Top Forge Open Day, three early waterwheels and two iron forging hammers, Forge Lane, Thurgoland, Sunday, 11am-5pm (free).
South Yorkshire Energy Centre, Family Fuel Busters Sunday Surgery and Sheffield Renewables Information Session, Alexandra Road, Heeley, Sunday, 11am-3pm.
Plant Sale, bedding plants, shrubs and perennials from the Friends of the Botanical Gardens, Botanical Gardens, Clarkehouse Road, Sunday, 11am-3pm.
Walk Sheffield 2011, launch walk to Lady’s Bridge and along Upper Don Walk, Monday, meet outside Star offices, York Street, 1pm.
Low Cost Urban Plantings, talk by Dr Nigel Dunnett of the University of Sheffield, to the Friends of the Botanical Gardens, Classroom, Botanical Gardens, Clarkehouse Road entrance, Monday, 7pm (visitors welcome £2).
How to Identify Small Birds, expert Carl Hawke shows how, Tuesday, meet Moorland Discovery Centre, Longshaw Estate, 9.30am.
Sheffield’s Weather, launch of new book by Sorby Natural History Society, Town Hall Conference Room, Pinstone Street, Tuesday, 6.30pm.
Rivelin Valley Evening Walk, with Roger Kite of Rivelin Valley conservation group, Tuesday, meet at Rivelin Mill car park, Rails Road, 7pm, and finishing at Coppice House Farm for refreshments around 9pm.
Local History Round Walk, organised by Bradfield Walkers Are Welcome, Tuesday, meet outside Royal Hotel, Dungworth, 7pm.
Introduction to Birdwatching, stroll around Owlthorpe with Pete Brown of Sheffield Bird Study Group, Wednesday, meet Owlthorpe Medical Centre, Moorthorpe Bank, off Moorthorpe Way, 8am.
Wednesday Hike, with Grenoside Wednesday Wayfarers, choice of two or three walks of around eight miles, Wednesday, meet Grenoside Community Centre, 10am-4pm (2465177).
Practical Work in the Botanical Gardens, with the Friends of the Botanical Gardens, no experience needed, tools and instruction provided, Wednesday, 10am to noon, meet at classroom near South Lodge, Botanical Gardens, Clarkehouse Road (2360293).
Midweek Walk, guided walk in Coal Aston area to identify breeding birds by sight and song, suitable for most ages but quiet is essential, organised by Sheffield RSPB Local Group,Wednesday, meet Coal Aston Community Hall car park, 10am.
Reading the Landscape in the Porter Valley, evening walk of 1.5 miles with the Friends of Porter Valley examining the geological and archaeological background to the development of the landscape of the valley, Wednesday, meet Forge Dame cafe, 6pm.
Walk Around Darnall, exploring the evolution of a Victorian suburb with the South Yorkshire Group of the Victorian Society, Wednesday, meet Holy Trinity Church, junction of Main Road and Station Road, 6.30pm.
Shirtcliffe Valley Introductory Walk, circular two-hour walk led by Pat Howells of the Friends of Shirtcliffe, Wednesday, meet Bramley Avenue entrance to Shirtcliffe Valley, Handsworth, 6.30pm.
Gardens Tree Trail, Kay Keeton leads walk around the Botanical Gardens looking at rare and beautiful trees, Wednesday, meet Main Gatehouse on Clarkehouse Road, 7pm.
Dawn Chorus at Heeley City Farm, identifying the resident garden birds to estimate the nesting population, Heeley City Farm, Richards Road, Thursday, May 12, 6.30am.
Five Weirs Walk, evening walk along the River Don with talk on the history of the urban river from members of the Five Weirs Walk Trust, Thursday, May 12, meet Lady’s Bridge, The Wicker.