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economist suntribune environment thursday april 18 2002 staff photosjoerd witteveen thornhill secondary school science teacher terry tamblyn supervises students as they plant trees in scarborough members of the schools environment club include michael lieberman left lisa lim jennifer kim alexis smith kingsley chak and eric dzneladze opportunity to make a difference in world events in markham whitchurchstoufjville by mike adler staff writer sked why hes planting trees this earth day week end thornhill teenager michael- lieberman quotes the rev jesse jackson tears will bring you sympathy sweat will bring you change mr lieberman 15 vicepresi dent of thomlea secondary schools environment club hopes the sweat he produces will encour age others to become involved someone has to do some thing fellow student kingsley chak 16 explained thisweek the dub which started last fall and raised 300 for the envirpn- mental group save the oak ridges moraine willbe the first of more than 1000 planters expected at 10000 trees for the rouge valley the largest one planting in canada the event come rain or shine will set 6000 trees in soil just south of markham this sunday from 9 am to 430 pm the site is on littles road at steeles avenue east of ninth line some of the trees on the prevk ous sites are large enough that you could climb them now said vvilla harris a 10000 trees organizer people making earth day reso lutions to garden without pesti cides or a lot of watering can check out the york region naturally show sundayfrom 10 am to 4 pm at the royal canadian legion branch on industrial parkway north in aurora besides talks from york region naturalists natalie helferty and david tomlinson the show fea tures lots of exhibitors who can talk about the merits of gardening with native plants including toronto author lorraine johnson all the plants ill be talking about are easy to grow and none of them need pesticides she said in an interview mr tomlinson noted natural gardens are not about let ting things go around your home its about conscious gardening and design and putting in species that are attractive its about conscious gardening and design and putting in species that are attractive the toronto region con servation authority needs planters from 9 am to noon sunday for the william granger greenway a trail on the humber river in vaughan that can be reached through canada company avenue near islington avenue organizers typically ask volun teer tree planters to bring along waterproof boots and gloves plus a bucket and shovel experts from the conservation authority are lined up at 1 to 4 pm sunday afternoon for earth day workshops with demonstrations that appeal to kids alex waters shows how to build a solarpowered car or a wind tur bine at the richmond hill indigo store hwy 7 and yonge street aileen barclay suzanna bradford and some live critters will be on hand at the woodbridge chapters outlet hwy 7 and weston road to tell people about wildlife found in their back yards the markham conservation committee stages its eartli day celebration in the centre court of markyille shopping centre mccowan road and hwy 7 from 11 am to 330 pm saturday also on saturday save the rouge valley system invites people to plant trees in the markhams paramount park on parkway avenue east of paramount road youll be able to see real raptors in action at the mayors earth day and bicentennial celebration in wliitchurchstouffville 9 am to 3 pm at the towns museum grounds and varidorf park which is beside the museum on woodbine avenue north of bloomihgton road v local falconer reid forrester bringing a bald eagle and hawks to the event will demonstrate his craft at 130 pm a lot of the wildlife we see in our community is dependent on us being responsi ble he said participants can build a bird- house to take home and help plant 600 shrubs and trees along a tribu tary of the holland river on the museum grounds its a cold- water creek and we are trying to replant some of- the dying trees that surround it said stouffville councillor mark carroll expert on attracting butterflies to speak in woodbridge sunday by mike adler staff writer butterflies are finicky eaters so if you want them around youd better lay out the right sort of buffet the fragile insects only stay in gardens with sun- shelter and clus ters of bright fragrant flowers whose nectar they can easily drink they will also demand a spot of standing water or wet sand for moisture the toronto region conservation authority says many butterfly species are very specific about what they will eat or where theyll lay their eggs said aileen barclay the authoritys stew ardship coordinator the monarch whose orange- andblack pattern is wellknown can only eat milkweed she said this week bee balm monarda butterfly bush pussy willow blackeyed susans pearly everlasting and asters are also known to attract but terflies so might your backyard com- post pile if you have one since some varieties are drawn to rotten fruit once attracted a butterfly will sit on a flower and dip a proboscis its tongue into the nectar ms barclay said they are excellent pollinators for gardens she will speak about butterflies and other back yard wildlife sunday from 1 to 4 pm at the chapters bookstore iri woodbridge 3900 hwy 7 its the scales on their wings that give butterflies their patterns and colours they lay eggs on host plants and the eggs hatch into caterpillars that shed skins as they grow caterpillars enter a chrysalis a stage of meta morphosis into the adult butterfly as adults species live from two weeks to eight months t the mqnarcri v migrates south but a few other species winter here such as the question mark it appears brown for camouflage but when threatened flashes a rusty orange pattern edged with purple it mimics a leaf and then when a bird comes it opens up and flash es with colour and scares the bird the monarch butterfly is a much- desired guest among gardeners but its preferred diet is milkweed ms barclay said many butterfly species are con sidered to be at risk of disappearing at least partly due to pesticides or because plants they favour become less common j you can buy plants for butterflies and learn about thehv at garden centres in the region sheridan nurseries on hwy 7- in unionville displays butterfly garden plants in an enclosure along with information on butterflies its nice to sit out on your patio and seethe butterflies come along said bui power retail nursery super visor of the store it adds an ambiance to that area a peaceful- ness use oldfashioned flowers in a butterfly garden because many newer varieties are hybrids without nectar or smell ole madseri i of madsenjs greenhouses and garden centre in newmarket advised some of the plants butterflies like best thistles milkweed gol- drerirod dandelion are ones many people consider nuisance weeds- yi- just because you dont see but terflies doesnt meahj theyre riot there their eggs are usuallylhidden under leaves ms barclay said ive bought plants from nurseries with caterpillars already on them j butterflies are easily killed by pesticides she said if youre going to build a butterfly garden you cant use chemicals it becomes a death- trap rather than a habitat