SATURDAY, APRIL 20

Louis Collins Annual Fishing Derby: 7 a.m. to 3 p.m., rain or shine, Ayer Gun & Sportsman's Club, 255 Snake Hill Road, Ayer. Open to the public, no license required. Stocked trout ponds with four-fish limit! Cost: $13 for adults, $7 for kids, $30 family limit, which includes parents ad kids 12 and younger. Trophies, cash prizes, raffles!

Applewild open house: 9-11 a.m. There's a lot going on at Applewild! Learn about summer camp offerings, June 24-Aug. 2, the Child Development Center, pre-school and day care for three- and four-year-olds, and K-8 admission including financial aid and scholarships. Applewild is located at 120 Prospect St., Fitchburg. Call 978-342-6053 for information.

Church supper: Baked Chicken Breast supper will be held at the Christian Union Church in West Groton from 5-7 p.m. The chicken will be served plated but the all the fixings will be family-style. Come try this new menu item; we always appreciate your feed back. The menu includes mashed potato, gravy, stuffing, corn, cranberry sauce, rolls and butter, dessert (brownie and ice cream) and beverage. The price remains the same: $10 for adult; 6-12 $5 and under 6 eat free. Takeouts will be available and no reservations required. The church is located on West Main Street (Route 225) across from fire station. For information call 978-448-5480.

Parker Quartet at Kalliroscope Gallery: 8 p.m., 264 Main St., Groton. Described by The New York Times as "something extraordinary," the Grammy Award-winning Parker Quartet returns to Groton's Kalliroscope Gallery after their amazing evening of chamber music last season. A wine and cheese reception with the performers follows the concert. TICKETS: $32 ($15 students): 978-486-9524 ext. 116 or www.indianhillmusic.org. Sponsored by Markham Group.

SUNDAY, APRIL 21

Louis Collins Annual Fishing Derby: 7 a.m. to 3 p.m., rain or shine, Ayer Gun & Sportsman's Club, 255 Snake Hill Road, Ayer. Open to the public, no license required. Stocked trout ponds with four-fish limit! Cost: $13 for adults, $7 for kids, $30 family limit, which includes parents ad kids 12 and younger. Trophies, cash prizes, raffles!

Breakfast: 8-11 a.m., Ayer Sportman's Club, 255 Snake Hill Road, every Sunday until Mother's Day. Free coffee and juice.

MONDAY, APRIL 22

"Notorious" Duo Plays at Groton School: Notorious, featuring musicians Eden MacAdam-Somer and Larry Unger, performs the final concert of the 2012-13 Gammons Concert Series at Groton School at 7 p.m. in the Gammons Recital Hall. The public is welcome to this free event. Sweet vocals and virtuosic fiddling coupled with driving rhythm and snappy guitar solos thrill audiences, in a repertoire that spans continents. Unger, declared "guitar genius" by Sing Out Magazine, combines his talents with those of MacAdam-Somer, an exciting and versatile young violinist. Her classical and jazz background merges with Unger's driving style to push the envelope toward swing, blues, and Gypsy modes. The program will feature traditional American, Romanian and Afghan music.

WEDNESDAY, APRIL 24

United Way campaign finale and thank you event: The United Way of North Central Massachusetts will hold its annual Campaign Recognition and Thank You Event at 5 p.m. at the Four Points by Sheraton, 99 Erdman Way, Leominster. United Way will acknowledge volunteers and area companies for their workplace campaigns. In addition, Comedian Jim Colliton will entertain the audience. The event is free. Anyone interested in attending should RSVP to the United Way of North Central Massachusetts at 978-345-1577 or uwncm@uwncm.org.

THURSDAY, APRIL 25

Pre-foreclosure clinic: The Home Ownership Center of North Central Massachusetts is hosting a pre-foreclosure clinic at the Twin Cities CDC office. The Home Ownership Center staff will help homeowners evaluate pre-foreclosure options at no cost, which include: refinancing your mortgage, modification of your existing mortgage, a repayment plan, short sale and deed-in-lieu. To register for the April 25, 5:30 p.m., class, please email info@homesncm.org or call the Home Ownership Center at 888-978-6261. Twin Cities CDC is located at 470 Main St.

FRIDAY, APRIL 26

Jimmy Tingle's "American Dream": This arts fundraiser will play at the Ayer-Shirley Regional High School Auditorium at 7 p.m. Tickets are FREE to ASRSD students; $20 for adults in advance ($25 at the door); $15 for groups and students outside out district. 100 percent of the PROCEEDS go back to the students. For tickets and information, call 978-772-2545 or email AyerShirleyDrama@gmail.com. Tickets are also available online via the ASYD website at www.jacneed.com/ASYD/Tickets.htm.

FRIDAY, APRIL 26 and 27

Annual clothing sale: The First Parish of Bolton, located at 673 Main St. in Bolton, will hold its Annual Clothing Sale from April 26 from 10 a.m. to 6 p.m. and on Saturday, April 27, from 10 a.m. to 3 p.m. In addition there will be some household and decorative items. On Saturday, April 27, at noon, all items remaining will be marked to half price, ending at 2 p.m. From 2-3 p.m. on Saturday there will be a bag sale --two different size bags with as many items as you can fit in a bag for one small fee of $2 or $3 per bag! For information contact Linda Skinner Austin at 978-779-6076 or boltonpan@verizon.net.

Earth Day celebration: Join the Devens Eco-Efficiency Center for an Earth Day community celebration from 11 a.m. to 1 p.m. For questions or to RSVP, contact Dona Neely at donaneely@ecostardevens.com or 978-772-8831 ext. 3304.

NVC Sings Mozart's Requiem: The Nashoba Valley Chorale will perform its spring concert, "The Eternal Path," at 8 p.m. at St. Anne Catholic Church, 75 King St., Littleton. The performance features Mozart's Requiem and several works by Bruckner, Weelkes and Sir John Kenneth Tavener. The Chorale is accompanied by professional musicians affiliated with the Indian Hill Music School, and professional vocalists from the Boston area perform solos. Tickets are $20 adults, $15 seniors/students, and $5 children. Visit nashobavalleychorale.org for information.

SATURDAY, APRIL 27

SIGN UP: The National Multiple Sclerosis Society will hold Muck Fest MS Boston, a mud and obstacle fun run, on April 27, in Devens. To register or donate, go to http://main.nationalmssociety.org/site/PageServer?pagename=HOM_MUCK_2013_MuckFest_info_boston.

Mozart's Requiem: The Nashoba Valley Chorale performs their spring concert, "The Eternal Path," presenting Mozart's Requiem and several works by Bruckner, Tavener, and Taverner at 8 p.m. at St. Anne Catholic Church, 75 King St., Littleton. Tickets are $20 adults, $15 seniors/students, and $5 children. Visit nashobavalleychorale.org for information.

Church supper: Townsend Congregational Church invites you to enjoy an Italian Dinner with pasta, salad, garlic bread and desserts from 5-6:30 p.m. Root beer floats are available for $1. The dinner will be hosted by the teachers and children of the Sunday School program. Tickets, available at the door, are $ 7 for adults and $4 for children ages 3 through 8. As always, children under 3 eat free! Dinners are also available for take-out. Townsend Congregational Church is an open and affirming member of the United Church of Christ. Everyone is welcome to attend our worship and community events. For more information, call 978-597-8925.

SUNDAY, APRIL 28

Breakfast: 8-11 a.m., Ayer Sportman's Club, 255 Snake Hill Road, every Sunday until Mother's Day. Free coffee and juice.

Concert series: The Virginia Thurston Healing Garden announces the next "Concert at the Garden" at 3 p.m. "The Unexpected," a popular jazz group from Boston, will be playing a variety of jazz standards and original arrangements at the Garden for your listening pleasure. The Healing Garden, a nonprofit organization, is located at 145 Bolton Road in Harvard, and offers support, educational and therapeutic services to those affected by cancer. Admission is $10 for Garden members, $15 for nonmembers. All proceeds benefit the services of the Healing Garden. Visit www.healinggarden.net for event updates or cancellations.

COMING UP...

NRWA to Lead Spring Bird Walk in Groton

The public is invited to join Mark Archambault of the Nashua River Watershed Association (NRWA) for a free guided "Spring Bird Walk" on Saturday, May 4, from 7:30-10 a.m., in Groton.

Mark Archambault is NRWA's Smart Growth Circuit Rider and an avid birder. We'll meet first at the NRWA's River Resource Center at 592 Main St. in Groton at 7:30 a.m.; then, we'll proceed to a local Groton conservation property where we will look and listen for spring migrants such as warblers, vireos, orioles, tanagers, bobolinks and many other species.

This walk is appropriate for ages 12 and up. Participants should bring their own bird guides and binoculars, if they have them. Water and snacks will also make for a more pleasant excursion. In the event of heavy rain, the excursion will be held on the next day, Sunday, May 5 at the same time. This program will be limited to 25 people; reservations are required.

To reserve a spot, please contact Mark at MarkA@NashuaRiverWatershed.org, or call 978-448-0299. Please indicate the number of people in your party, if more than one, and their names. People who register after the first 25 spots are taken will be placed on a waiting list.

Family Health and Wellness Expo

Join us at Emerson Hospital's annual Family Health and Wellness Expo on Saturday, May 4, 9 a.m. to 1:30 p.m., at the hospital's main campus located at 133 Old Road to Nine Acre Corner in Concord. The event will feature free screenings, cancer and general health information, conversations with health and wellness experts, children's activities and more!

Registration is required at 1-877-936-3776 for the following screenings: skin cancer; lipid profile/cholesterol (with a 12-hour fast required); prostate specific antigen (PSA); and thyroid function. No registration is required for chair massage, body fat analysis or screenings for blood pressure, bone density, diabetes, oral cancer, respiratory or postural issues.

For more information, visit www.emersonhospital.org.

Beavers as Engineers: NRWA Science Saturday for 7- to 11-year-olds

There are many amazing engineers in the natural world--spiders with their webs, birds with their variety of nest constructions, and, of course, the beaver with its dam.

The Nashua River Watershed Association invites young scientists, ages 7 to 11, from all communities to join us for our Science Saturday program on "Beavers as Engineers" on Saturday, May 4, from 12:30-2:30 p.m., at the historic Williams Barn property, 160 Chicopee Row in Groton.

Learn about how beavers use "tools" to build dams and lodges. Practice using human tools (chisels) that replicate beaver tools (teeth). We'll also hike to an active beaver lodge and explore the area.

Science Saturday costs $25. Pre-registration is required. To pre-register, please contact Mary Marro, NRWA environmental education director, at 978-448-0299, or email MaryM@NashuaRiverWatershed.org.

Harvard Pro Musica

Harvard Pro Musica, under the direction of Dr. Mark Bennett, will present "Into the Light," a performance of choral music for our times. The program features "Rejoice in the Lamb" by Benjamin Britten, "Lux Aeterna" by Morten Lauridsen, and "Tryptych" by Tarik O'Regan.

Saturday, May 4, 7:30 p.m., at St. Matthew's United Methodist Church, 435 Central St., Acton. Tickets $20; seniors/students with ID $16; Children under 12 free. For information: www.harvardpromusica.org.

Mirror Lake fishing derby

Mark your calendars for the Devens Youth Fishing Derby at Mirror Lake on May 18. Registration begins at 8 a.m. with fishing from 9 a.m. to noon. For questions or to register, contact Kim Walsh at kwalsh@massdevelopment.com or 978-772-8875.