Newsletter - April 2025
Wild Birds Unlimited - San Diego Events:
April Events:
April 12-13 – San Diego Birdathon
- Similar to a walkathon where you count steps and raise money, the Birdathon is an opportunity to raise funds for the San Diego Bird Alliance as teams count bird species. And don't worry, you don't need to be experienced at all to take part in the fun!
- Each team's counting must take place in a 24-hour period between 11 April and 11 May. All counts and funds raised must be in by 31 May.
- We have registered Team Wild Birds Unlimited and will be doing our counts between 4PM on Saturday, April 12 and 4PM on Sunday, April 13 at four locations.
- We are hoping to raise over $4,000 in donations and observe at least 150 bird species.
- Our top donor will receive a signed copy of Amy Tan's book The Backyard Bird Chronicles (A drawing will be held if there's a tie.)
We will be meeting at the following places and times:
| Date |
Time |
Duration |
Location |
| 12 April |
4:00 PM |
3 hours |
Robb Field |
| 13 April |
7:00 AM |
2 1/2 hours |
Steele Canyon Bridge Trail |
| 13 April |
10:00 AM |
3 hours |
Santee Lakes |
| 13 April |
1:30 PM |
2 1/2 hours |
Ramona Grasslands |
We think these locations will provide a great mix of coastal, freshwater, and inland habitats and give us our best chance at achieving our goal of 150 species. Stop by one of the locations for as little or as much time as you like.
Sign up to join us or make a donation at our team page found here. We'll share more specific details on where exactly we'll meet as the time gets closer with those who have signed-up.
When you sign up, the form asks for your fundraising and species goals which are up to you personally, not for the team totals. You can leave the optional vanity URL and Additional Information fields blank if you wish.
When you donate, please be sure to select "Give credit to a fundraiser or team" and pick "Wild Birds Unlimited." You can leave a flat donation or make a pledge per species when donating to a team member (both are tax-deductible). Every dollar counts for our feathered friends!
We're so grateful for your support and hope we can raise a lot of money for the Bird Alliance. You can find more information about the Bird Alliance, their mission, and the Birdathon here at their website.
Quote of the Month:
“On a day like this, I can’t imagine anything better that might happen in a person’s life than for them to start paying attention to birds—to become aware of this magical world that exists all around us, unnoticed by many but totally captivating for those who know its secrets. This kind of spring day, with its bountiful myriads of colourful sprites just arrived from tropical shores, has to be one of the greatest gifts of life on Earth.”―Ken Kaufman
Spotlight:
California Bluebird Recovery Program The following information was taken from the San Diego Bird Alliance website. We encourage you to visit the website page with the full details HERE. Best known as the harbinger of spring, the Western Bluebird is the flagship species for the California Bluebird Recovery Program (CBRP), a statewide community science program. The nestboxes installed help supplement lost habitat for cavity-nesting birds with weekly monitoring from February through August. Keep reading for more information + to learn how you can get involved! The Western Bluebird + Other Cavity Nesting Birds  Western Bluebirds and a handful of other birds that range from perching birds, swallows, parrots, and owls are “second-cavity nesters” that rely on existing cavities in dead trees and tree hollows to build nests. Existing cavities used by second cavity nesters may be excavated by “primary cavity nesters” such as woodpeckers that also use cavities to raise young. Cavity-nesting birds have many conservation concerns caused by humans, loss of habitat from the destruction of old-growth forests due to logging, urban expansion from land development, and the removal of dead trees limiting tree cavity availability for second-cavity nesting birds. Excessive pesticide use contributes to the insect apocalypse with declines reducing food availability for insectivorous birds. Did you know? Dead trees provide significant ecological value for more than 1,000 species of wildlife worldwide. By some estimates, the removal of dead material from forests can mean a loss of habitat for up to 1/5 of the animals in the ecosystem. Dead trees provide areas for birds to perch and roost together, supply a food source of insects, provide protection from predators and shelter, and serve as a nursery for primary cavity and second cavity-nesting birds. There are also numerous conservation concerns for cavity-nesting birds with climate change. With warmer temperatures expected in the future, the temperature inside cavities may be too hot to raise young during the hottest times of the year. Phenological mismatch or the mismatch of the timing of resources may occur in response to warmer temperatures. For example, delayed arrival to breeding grounds due to warmer temperatures may shorten the time for breeding, or inconsistent weather patterns such as rain during spring may delay insects when parents need to feed and raise young.  Best known as the harbinger of spring though occurs year-round in San Diego County, the Western Bluebird is the flagship species for the California Bluebird Recovery Program (CBRP), a community science statewide nestbox monitoring program that has supported over 400,000 cavity nesting fledglings since the program was started in 1994 by Dick Yoder. The nestboxes help supplement lost habitat for cavity-nesting birds with weekly monitoring from February through August. This program is affiliated with the North American Bluebird Society and as of 2023, CBRP has been re-initiated in San Diego County.  Get Involved Are you interested in contributing efforts to help address conservation concerns for cavity-nesting birds? Can you commit to monitoring nestboxes weekly from February through August? Then we'd love your help! You can participate as a nestbox monitor by:
- Installing a nestbox on private property (Wild Birds Unlimited sells a variety of bluebird nestboxes).
- Applying to become a trail monitor where a nestbox will be assigned to you for the season
- Registering an existing nestbox.
Here's how it works:
- Take the introductory training by watching the 25-minute video or attend a CBRP-hosted workshop.
- Depending on your scenario, click on the link below:
FOR NESTBOXES ON PRIVATE PROPERTIES: I already have a nestbox installed on private property and need to register the box. I checked the site assessment web application and would like to request a nestbox for private property. There is no data in my area and I would like to request a site assessment. FOR NESTBOX TRAIL MONITORING: I would like to apply to become a trail monitor. I know an existing nestbox installed on a trail and would like to register this box. To improve data quality and to help avoid nestbox abandonment when monitors leave the program, each nestbox is tracked by geographic location and provided a unique identifier. If you are new to the program, we ask that all volunteer monitors complete the training. California Bluebird Recovery Program fits into San Diego Bird Alliance's multifaceted approach to help address conservation issues of cavity-nesting birds. The organization actively advocates for cavity-nesting species, facilitates native habitat restoration throughout the county through public events, the Conservation Committee’s Native Plant Invasion campaign, and seed libraries throughout the county. SDBA has participated in collaborative efforts with like-minded organizations to help improve habitat and resources for cavity-nesting birds such as involvement on the task force for the City of San Diego to become a “Bee City USA” to actively advocate for native bees and reduce pesticides use and the impact on insects that affect food availability for insectivorous birds. To help track the status of insect populations, SDBA hosts and participates in community science events focused on insect data collection including the North American Butterfly Association Butterfly Count & hosted Moth Nights at the Kendall Frost Marsh and Famosa Slough. In 2021, the organization provided professional training to tree care professionals about nesting birds in San Diego by collaborating with Tree Care for Birds and Other Wildlife at the Professional Tree Care Association Annual Field Day and Seminar. To increase the chances of success for the program, the CBRP San Diego Team uses geospatial tools to improve the decision-making process to help determine if a location is suitable for a nestbox. The Private Property Nestbox Placement Web Application was created using ebird data of target and non-target species from the past couple years and provides information on possible bird species encountered at a designated location. We plan to improve and refine the model over time and encourage private property monitors to submit local data near the nestboxes of target and non-target species to eBird. For the placement of trail monitor nestboxes, we use a habitat suitability model that considers habitat requirements for target species, species presence, and the location requested by trail monitors. For any program inquiries, please contact the CBRP San Diego Team. The CBRP San Diego Team is led by Lesley Handa, San Diego County Coordinator, and CBRP Board Member. The 2024 Team members include Media Team member Erika Rodgriuez. Interested in joining our team to help grow the program? Please contact us HERE! Cavity-Nesting Birds in the News! Pala & Torrey Pines Students Delve Into Bluebird Nest Data, 2023 Vol. 29, No 2C BRP Newsletter
The Summer I Turned Birdy, LaTresa Pearson, Fall 2023 Sketches High School Students Showcase Data Science Project at 2024 San Diego Bird Festival References Goulson, D., 2019. The insect apocalypse, and why it matters. Current Biology, 29(19), pp.R967-R971.
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Bird of the Month: Western Bluebird
Western Bluebird, photographed in San Carlos by David Reed
Fun Facts About the Western Bluebird:
- Migration Patterns: While some Western Bluebirds (Sialia mexicana) are year-round residents in San Diego, others migrate altitudinally, moving to lower elevations during colder months in search of food.
- Vivid Plumage: Male Western Bluebirds boast bright blue feathers on their heads, backs, and wings, complemented by a rusty orange chest. Females display more subdued grayish-blue tones with hints of orange on the chest.
- Habitat Preferences: These birds favor open woodlands, forest edges, and areas with scattered trees. In San Diego, they are commonly found in oak woodlands, parks, and suburban areas with ample green spaces.
- Dietary Habits: Western Bluebirds primarily feed on insects such as beetles, caterpillars, and grasshoppers during the breeding season. They also consume fruits and berries, especially in the fall and winter months. They love live mealworms!
- Cavity Nesters: These birds rely on tree cavities or abandoned woodpecker holes for nesting. They readily accept human-provided nest boxes, making them popular among bird enthusiasts aiming to support local populations.
- Social Structure: Western Bluebirds are known for their cooperative breeding behavior. Offspring from previous broods often assist parents in raising new chicks, enhancing the survival rate of the young.
- Vocalizations: Their calls consist of soft whistles and chirps. Males sing to establish territories and attract mates, especially during the breeding season.
- Lifespan: In the wild, Western Bluebirds have an average lifespan of 4 to 6 years. However, some individuals have been recorded living up to 8 to 10 years under favorable conditions.
- Conservation Success: Due to habitat loss and competition for nesting sites, Western Bluebird populations declined in the past. Conservation efforts, including the installation of nest boxes, have significantly aided their recovery.
- Insect Control: By consuming large quantities of insects, Western Bluebirds play a vital role in controlling pest populations, benefiting agriculture and gardens in San Diego.
- Breeding Season: In San Diego, the breeding season typically spans from March to July. During this period, pairs can raise multiple broods, each consisting of 4 to 6 eggs.
- Nest Construction: Females take the lead in building nests using grasses, pine needles, and other plant materials, creating a soft bed for their eggs within tree cavities or nest boxes.
- Territorial Behavior: Males are territorial during the breeding season, often engaging in displays to ward off rivals and protect their nesting sites.
- Fledgling Development: Chicks fledge approximately 18 to 21 days after hatching. Post-fledging, parents continue to feed and guide them as they learn to forage independently.
- Attracting Bluebirds: San Diego residents can attract Western Bluebirds to their yards by installing appropriate nest boxes, providing fresh water sources, and planting native berry-producing shrubs.
- Cultural Significance: Bluebirds are often seen as symbols of happiness and hope. Their presence is celebrated in various cultures and is a delightful sight for birdwatchers in San Diego.
- Predator Awareness: Common predators include snakes, raccoons, and domestic cats. Ensuring safe nesting environments is crucial for their reproductive success.
- Molting Process: Western Bluebirds undergo an annual molt after the breeding season, replacing old feathers to maintain optimal flight and insulation capabilities.
- Foraging Behavior: They often perch on low branches or fences, scanning the ground for insect prey, and then swoop down to capture it - a behavior known as "drop-hunting."
- Role in Ecosystem: Beyond insect control, Western Bluebirds aid in seed dispersal through their fruit consumption, contributing to the health and regeneration of local ecosystems.
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What’s happening in San Diego:
San Diego Bird Alliance (formerly San Diego Audubon Society)
- Birding at Lindo Lake
- Date: April 5, 2025
- Time: 8:00 AM – 10:00 AM
- Location: Lindo Lake, Lakeside
- Event Link
- Speak for the San Diego River Mouth and Nature Walk
- Queer Hike: Lakeside Riverpark
- Date: April 10, 2025
- Time: 8:00 AM – 10:00 AM
- Location: Lakeside Riverpark, 10354 Channel Road, Lakeside
- Event Link
- Wander the Wetlands: Bird Outing
- Date: April 12, 2025
- Time: 9:00 AM – 11:00 AM
- Location: Crown Point Dr, San Diego, CA 92109
- Event Link
- Birdathon 101: Lake Murray
- Date: April 12, 2025
- Time: 9:00 AM – 11:00 AM
- Location: Lake Murray Recreation Area, 5650 Kiowa Dr., La Mesa
- Event Link
- Speak for the San Diego River Mouth
- Bird Photography Club: Photo Stroll at Torry Pines
- Date: April 19, 2025
- Time: 7:00 AM – 9:00 AM
- Location: Torry Pines (directions provided 48 hours before the trip)
- Event Link
- Birding Outing: Famosa Slough
- Date: April 19, 2025
- Time: 9:00 AM - 11:00 AM
- Location: At the sign on Famosa Blvd. north of the Rialto St. , San Diego
- Event Link
- Birding Outing: Marian Bear Open Space with Anitra Kaye
- Date: April 26, 2025
- Time: 8:00 AM – 11:00 AM
- Location: Marian Bear Open Space, 5544 Regents Rd., San Diego
- Event Link
- Wander the Wetlands: Work Party
- Date: April 26, 2025
- Time: 9:00 AM – 11:00 AM
- Location: 2055 Pacific Beach Dr, San Diego
- Event Link
- Bird Outing: Birding at Lindo Lake – East Side
- Date: April 27, 2025
- Time: 8:00 AM – 10:00 AM
- Location: 12660 Lindo Ln, Lakeside
- Event Link
Palomar Audubon Society
- Panama Birding Adventure
- Dates: April 29-April 5, 2025
- Time: 8:00 AM (April 29) – 5:00 PM (April 5)
- Location: See link for details
- Event Link
- Daley Ranch Field Trip
- Date: April 5, 2025
- Time: 8:00 AM – 11:30 AM
- Location: 2253 La Honda Dr, Escondido
- Event Link
- Wilderness Gardens Preserve Field Trip
- Date: April 12, 2025
- Time: 8:00 AM – 11:30 AM
- Location: 14209 Hwy 76, Pala
- Event Link
- Santa Rosa Plateau Ecological Reserve Field Trip
- Date: April 19, 2025
- Time: 8:30 AM – 11:30 AM
- Location: 39400 Clinton Keith Rd, Murrieta
- Event Link
- Big Morongo Canyon Preserve Field Trip
- Date: April 26, 2025
- Time: 8:30 AM – 11:30 AM
- Location: 10967 Covington Drive, Morongo Valley
- Event Link
Buena Vista Audubon Society
- Rancho Carrillo Trail
- Date: April 4, 2025
- Time: 7:30 AM – 8:30 AM
- Location: Rancho Carrillo Trail, Carlsbad
- Event Link
- Whelan Lake Bird Sanctuary Walk
- Date: April 5, 2025
- Time: 8:00 AM – 10:00 AM
- Location: Whelan Lake, 3650 North River Road, Oceanside
- Event Link
- El Corazon Garrison Creek
- Date: April 9, 2025
- Time: 8:00 AM – 9:00 AM
- Location: El Corazon Park, 3210 Oceanside Blvd, Oceanside
- Event Link
- Kids’ Nature Clubhouse and Trail Exploration at the Nature Center
- Date: April 13, 2025
- Time: 11:00 AM – 12:30 PM
- Location: Buena Vista Audubon Nature Center 2202 South Coast Hwy., Oceanside
- Event Link
- Birding with Barbara
- Date: April 19, 2025
- Time: 8:00 AM – 10:00 AM
- Location: 95 N Vulcan Ave., Encinitas
- Event Link
- Preschool Nature Storytime at the Nature Center
- Date: April 28, 2025
- Time: 10:00 AM – 11:00 AM
- Location: Buena Vista Audubon Nature Center 2202 South Coast Hwy., Oceanside
- Event Link
San Dieguito River Valley Conservancy
- Creekside Critters with Free Flight
- Date: April 5, 2025
- Time: 1:30 PM – 2:30 PM
- Location: Del Mar Branch Library, 1309 Camino Del Mar, Del Mar
- Event Link:
- Yoga at the Birdwing
- Dates: April 6, 12 and 20, 2025
- Time: 10:00 AM – 11:00 AM
- Location: Birdwing Open Air Classroom, 15737 San Andres Dr, Del Mar
- Event Link
- Gonzales Canyon Habitat Restoration
- Dates: April 26, 2025
- Time: 9:00 AM – 11:00 AM
- Location: 13655 Sword Way San Diego, CA
- Event Link
- SDRVC BioBlitz Hike at Piedras Pintadas Trail
- Date: April 27, 2025
- Time: 9:00 AM – 12:00 PM
- Location: Rancho Benardo Community Park, 18448 West Bernardo Dr., San Diego
- Event Link
San Elijo Lagoon Nature Collective
- Discovery Tour
- Date: April 5, 2025
- Time: 10:00 AM – 11:30 AM
- Location: San Elijo Lagoon, Nature Center Loop Trail, 2710 Manchester Ave., Cardiff-by-the-Sea
- Event Link
- Family Fun Day
- Date: April 6, 2025
- Time: 10:00 AM – 12:00 PM
- Location: San Elijo Lagoon, Nature Center Loop Trail, 2710 Manchester Ave., Cardiff-by-the-Sea
- Event Link
- Volunteer Restoration Event:
- Date: April 9, 2025
- Time: 9:00 AM – 12:00 PM
- Location: TBD
- Event Link
- Wildlife Tour
- Date: April 12, 2025
- Time: 9:00 AM – 11:00 AM
- Location: San Elijo Lagoon, Cardiff-by-the-Sea
- Event Link
- A Queer Roots Event
- Date: April 19, 2025
- Time: 9:00 AM – 12:00 PM
- Location: San Elijo Lagoon (location will be emailed to registered participants)
- Event Link
Living Coast Discovery Center
- Bilingual Sweetwater Safari Hike
- Date: April 5, 2025
- Time: 11:30 AM – 12:30 PM
- Location: Living Coast Discovery Center, 1000 Gunpowder Point Drive, Chula Vista
- Event Link
- Sweetwater Safari Hike
Tijuana Estuary
- Nature Walk: An Eye-Opening Experience Without Sight
- Date: April 5, 2025
- Time: 11:00 AM – 12:00 PM
- Location: Tijuana Estuary Visitor Center, 301 Caspian Wy, Imperial Beach
- Event Link
- Bird Walk
- Dates: April 6 and 20, 2025
- Time: 10:00 AM – 11:00 AM
- Location: Tijuana Estuary Visitor Center, 301 Caspian Wy, Imperial Beach
- Event Link
- Nature Walk
- Date: April 12, 2025
- Time: 11:00 AM – 12:30 PM
- Location: 5th Street & Iris Avenue, 5th St & Iris Ave, Imperial Beach
- Event Link
- Explore the Colors of the Estuary: A Community Art Therapy Experience
- Date: April 13, 2025
- Time: 2:00 PM – 3:30 PM
- Location: Tijuana Estuary Visitor Center, 301 Caspian Wy, Imperial Beach
- Event Link
- Nature Book Club
- Date: April 26, 2025
- Time: 10:00 AM - 11:00 AM
- Location: Tijuana Estuary Visitor Center, 301 Caspian Wy, Imperial Beach
- Event Link
- Nature Walk
- Dates: April 26, 2025
- Time: 11:00 AM – 12:00 PM
- Location: Tijuana Estuary Visitor Center, 301 Caspian Wy, Imperial Beach
- Event Link
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