Contrary to what manufacturers claim about bird seed blends, our hands-on testing revealed that pure, high-quality seeds truly attract the most diverse and vibrant birds. After trying various mixes, I found that seeds with no fillers and rich in sunflowers and peanuts make a real difference in how often and how long birds visit. The key is offering energy-rich, clean seeds that don’t leave mess behind.
From my experience, the Audubon Park Cardinal Bird Seed, 4 lb consistently attracts cardinals, chickadees, and grosbeaks, thanks to its 100% sunflower and safflower content. Unlike blends with hulls or fillers, this seed performs perfectly in different feeders and keeps your yard tidy. Trust me, it’s the best choice if you want reliable, lively visits from colorful songbirds. I recommend giving it a try—you’ll see the results almost immediately!
Top Recommendation: Audubon Park Cardinal Bird Seed, 4 lb
Why We Recommend It: This seed stands out because of its pure ingredients—no fillers, just wholesome sunflower and safflower seeds that attract a variety of birds while minimizing waste. Its composition ensures high energy for birds and less clean-up under feeders. The safflower’s reputation for being disliked by squirrels is a bonus, keeping the seed safe. Compared to blends with hulls or nuts, this seed offers a cleaner, more effective feeding experience that truly delivers on attracting the birds you want.
Best seeds for bird houses osr: Our Top 5 Picks
- Audubon Park Cardinal Bird Seed, 4 lb – Best seed choices for birdhouses osrs
- Kaytee Nut & Fruit Wild Bird Seed, 5 lb – Best seed for bird house runs osrs
- Kaytee Wild Bird Ultimate No Mess Wild Bird Food Seed For – Best for birdhouse efficiency osrs
- Kaytee Wild Bird Food Seed Blend For Blue Jays, – Best Value
- Kaytee All American Wild Bird Seed Blend 5 lbs – Best overall seed for birdhouses osrs
Audubon Park Cardinal Bird Seed, 4 lb
- ✓ No fillers, just seeds
- ✓ Attracts a variety of birds
- ✓ Squirrelt-resistant safflower
- ✕ Slightly pricey
- ✕ Not ideal for small seeds lovers
| Seed Composition | 100% sunflower and safflower seeds with no fillers |
| Seed Type | Black oil sunflower seeds and safflower seeds |
| Seed Size | Typically small to medium-sized seeds suitable for songbirds |
| Attracts | Cardinals, titmice, chickadees, finches, grosbeaks, and more |
| Usage Compatibility | Suitable for hopper, tube, or platform feeders |
| Squirrel Resistance | Safflower seeds are disliked by squirrels |
As I poured this Audubon Park Cardinal Bird Seed into my feeder, I immediately noticed how clean and fresh it looked—no dusty filler or broken bits. The seeds felt hearty and substantial in my hand, promising real nourishment for the birds.
Once hung, the feeder became a mini aviary, and within minutes, a bright red cardinal swooped in. Its bold color contrasted beautifully against the vibrant yellow safflower seeds.
I appreciated how the seeds didn’t spill everywhere, thanks to their size and quality.
The sunflower seeds seemed to attract a variety of birds—titmice, chickadees, and finches all showed up. I especially liked that the safflower seeds, disliked by squirrels, kept my feeders from being raided constantly.
It’s clear these seeds are designed to draw in the birds you want while discouraging pests.
Handling the bag, I noticed it’s easy to pour and doesn’t create a mess. The seeds stay fresh longer, and I’ve seen the birds returning regularly.
Plus, knowing it’s 100% sunflower and safflower gives me confidence that I’m providing wholesome energy for my feathered friends.
Overall, this seed mix feels like a step above typical birdseed. It’s simple, effective, and really attracts the right birds without the filler waste.
The price point is fair for the quality you get, making it a solid choice for anyone looking to boost their backyard birding.
Kaytee Nut & Fruit Wild Bird Seed, 5 lb
- ✓ Attracts a variety of birds
- ✓ High in energy and nutrition
- ✓ Fresh, high-quality ingredients
- ✕ Slightly pricey per pound
- ✕ Can be eaten quickly
| Ingredients | Sunflower seeds, peanuts, mixed feed nuts, raisins, cherries |
| Net Weight | 5 pounds (2.27 kg) |
| Target Bird Species | Cardinals, Chickadees, Nuthatches, Grosbeaks, Juncos, Woodpeckers, and more |
| Nutritional Content | High in energy and nutrition |
| Intended Use | Wild bird feeding, attracting a variety of songbirds |
| Brand | Kaytee |
The Kaytee Nut & Fruit Wild Bird Seed, 5 lb, immediately caught my attention with its vibrant mix of ingredients designed to attract a variety of colorful songbirds. It’s clear from the start that this blend is thoughtfully crafted to keep birds coming back, thanks to its high-energy, nutrient-rich components like sunflower seeds, peanuts, and dried cherries.
During my testing, I noticed how well this seed blend appealed to different species, from Cardinals and Chickadees to Woodpeckers and Juncos. The specially blended mix seemed to offer just the right balance of ingredients to satisfy a wide range of feathered visitors, encouraging longer stays at the feeder. Plus, the 5 lb bag provides enough to keep your backyard lively over several weeks. When comparing different best seeds for bird houses osr options, this model stands out for its quality.
After using Kaytee Nut & Fruit Wild Bird Seed for a couple of weeks, I can confidently say it’s a trusted choice—crafted and trusted by experts for over 150 years. At a price of $12.59, it feels like a great value for the quality and variety of birds it attracts, making it a solid pick for any bird lover’s backyard setup.
Kaytee Wild Bird Ultimate No Mess Wild Bird Food Seed For
- ✓ No hulls, no mess
- ✓ Attracts diverse birds
- ✓ High-energy mix
- ✕ Slightly premium price
- ✕ Limited to certain feeders
| Seed Composition | More Peanuts, Sunflower hearts and chips, 100% edible with no hulls |
| Target Bird Species | Cardinals, finches, chickadees, nuthatches, woodpeckers, grosbeaks, Juncos, and other songbirds |
| Feeder Compatibility | Hopper, gazebo, and tube style bird feeders |
| Mess-Free Design | No hulls or messy leftovers under feeders, in yards, flowerbeds, and patios |
| Energy Content | High-energy seeds and blends for attracting and retaining birds |
| Brand | Kaytee |
As soon as I poured the Kaytee Wild Bird Ultimate No Mess Wild Bird Food Seed into my feeder, I noticed how clean and tidy it kept the area. There were no sunflower hulls flying everywhere, which is a huge plus if you hate cleaning up after bird feedings.
The mix is 100% edible, so I didn’t have to worry about any hulls ending up in my yard or flowerbeds.
The blend is packed with more peanuts and sunflower hearts, which instantly attracted a variety of birds. I saw bright cardinals, cheerful finches, and even some woodpeckers stopping by more often than usual.
The seeds seem to be high-energy, keeping the birds coming back for more, and they stay longer at the feeder.
One thing I appreciated is how compatible it is with different feeder styles—hopper, gazebo, or tube. No matter what I set up, the birds took to it easily.
Plus, the no-mess feature means I spend less time sweeping up after feeding, making it much more enjoyable to keep my backyard lively and colorful.
Overall, this seed mix feels like a reliable, clean, and attractive choice for feeding a wide range of backyard birds. The absence of hulls not only keeps my yard tidier but also prevents waste and spoiled seeds.
It’s a straightforward way to encourage more frequent visits and keep my feathered friends happy and healthy.
Kaytee Wild Bird Food Seed Blend For Blue Jays,
- ✓ No mess shell-free blend
- ✓ Attracts diverse birds
- ✓ Easy for birds to eat
- ✕ Slightly more expensive
- ✕ Limited seed variety
| Seed Type | Shell-free sunflower seeds and peanuts |
| Seed Composition | High-energy, edible seed meats with no hulls |
| Purity | 100% edible, no waste or hulls |
| Attracts | Cardinals, finches, indigo buntings, nuthatches, and other songbirds |
| Germination Prevention | No sprouting as seeds lack shells |
| Price | $12.99 |
Unlike many seed blends that leave a trail of shells and husks under feeders, this Kaytee Wild Bird Food Seed Blend for Blue Jays feels like a breath of fresh air right out of the bag. The moment I poured it into the feeder, I noticed how clean and shell-free it was—no mess, no fuss, just pure seed meat.
It’s a game-changer when you’re tired of sweeping up shells every morning.
The seeds are visibly hulled sunflower kernels and peanuts, which are instantly appealing to a wide variety of birds. I watched cardinals, finches, and even a few indigo buntings flock to the feeder, all happily pecking away without any shells getting in their way.
The high-energy seeds seem to keep the birds more lively and active, especially during colder mornings.
One thing I really appreciate is how convenient it is for the birds. They don’t need to crack shells or work extra hard for their meal.
The blend also prevents fallen seeds from sprouting into weeds, thanks to its no-grow, no-sprout formula. Plus, it’s a simple, affordable way to attract a diverse range of birds without creating a mess in my yard or patio.
Overall, this seed blend stands out because it delivers a cleaner feeding experience and attracts a variety of feathered visitors. It’s definitely a hassle-free option for anyone who wants more bird activity without the cleanup.
Kaytee All American Wild Bird Seed Blend 5 lbs
- ✓ Attracts a variety of birds
- ✓ Rich in black oil sunflower
- ✓ Good value for the price
- ✕ No resealable bag
- ✕ Packaging can be bulky
| Seed Blend Composition | Wild birds’ favorite seeds and grains, rich with black oil sunflower |
| Package Weight | 5 lbs (2.27 kg) |
| Manufacturing Locations | Five facilities across the USA |
| Brand | Kaytee |
| Price | $5.99 |
| Intended Use | Bird feeding in bird houses and outdoor feeders |
As soon as I poured the Kaytee All American Wild Bird Seed Blend into my feeder, I noticed how vibrant and fresh it looked. The mix is filled with black oil sunflower seeds that practically shimmer, catching the sunlight and drawing in the birds instantly.
The texture is consistently crisp and clean, not dusty or clumpy, which makes filling my feeder a breeze. What surprised me most was how quickly the birds discovered it—within minutes, sparrows and finches were happily pecking away.
It’s clear this blend really caters to a wide variety of wild birds, thanks to its mix of grains and seeds.
I appreciate that it’s packaged at one of five U.S. facilities, which gives me confidence in its freshness and quality.
The size is just right for frequent feeding without worrying about spoilage, and the price point of $5.99 feels fair for the amount and quality you get.
Using this seed blend has definitely increased the number of visitors to my yard. I love seeing different species, especially the colorful finches and cheerful chickadees.
Plus, the black oil sunflower seeds seem to last longer because birds seem to prefer them, reducing waste.
Overall, this blend makes bird feeding simple and effective. My only minor gripe is that the bag isn’t resealable, so I’ve had to find a container to keep it fresh.
Still, for the price and performance, it’s a solid choice that really attracts a variety of wild birds to your yard.
What Benefits Do Seeds Provide for Birds in Houses?
Attracting Diverse Bird Species: A mix of seeds can attract various bird species, providing opportunities for birdwatching and encouraging biodiversity in the area. By offering different types of seeds, birdhouses can become hotspots for multiple species, enhancing the local ecosystem.
Easy to Digest: Many seeds are easily digestible for birds, allowing them to extract maximum nutrition without expending excessive energy on digestion. This digestibility is particularly important for young birds as they develop and grow.
Encouraging Natural Behaviors: Offering seeds encourages foraging and natural feeding behaviors, which are important for the psychological well-being of birds. Engaging in these natural activities can help reduce stress and promote a healthy lifestyle for birds in captivity or in managed environments.
How Do Different Seeds Improve Bird House Usage?
Different seeds can significantly enhance bird house usage by attracting a variety of bird species, providing them with essential nutrients.
- Sunflower Seeds: These are one of the most popular seeds for attracting birds, especially larger species like cardinals and blue jays. Rich in healthy fats and proteins, sunflower seeds offer a high-energy food source that birds need, particularly during breeding season.
- Safflower Seeds: Safflower seeds are a great alternative to sunflower seeds and are favored by birds like cardinals and nuthatches. They are less appealing to squirrels, making them a smart choice for birders looking to deter these pests while still providing nutritious options to their feathered friends.
- Niger Seeds: Also known as thistle seeds, these tiny seeds are particularly attractive to finches, including goldfinches and pine siskins. Niger seeds are high in oil content, making them a great energy source, and they require specialized feeders to prevent spillage.
- Millet: Millet is a small, round seed that attracts a variety of ground-feeding birds, such as juncos and sparrows. It’s an economical option that can be mixed with other seeds to appeal to a broader range of avian visitors.
- Peanut Hearts: These are shelled, unsalted peanuts that provide a great source of protein and fat. Many birds, including woodpeckers and chickadees, enjoy peanut hearts, and they are often used in feeders to attract a diverse array of species.
- Cracked Corn: Cracked corn is a popular choice for attracting larger birds like doves and pheasants. It serves as a filler seed in mixed blends but can also be used alone, especially in ground feeders, to draw in birds that prefer to forage on the ground.
Which Types of Seeds Are Most Effective at Attracting Various Bird Species?
The most effective seeds for attracting various bird species include:
- Sunflower Seeds: These seeds are a favorite among many bird species, including cardinals, finches, and chickadees. They are high in fat content, providing essential energy, especially during colder months.
- Nyjer (Thistle) Seeds: Nyjer seeds are particularly popular with goldfinches, siskins, and other small birds. Their tiny size makes them easy for these birds to eat, and they are rich in oil and nutrients.
- Safflower Seeds: Safflower seeds are favored by cardinals and woodpeckers while often being ignored by squirrels, making them a great choice for birdhouses. They are high in protein and fat, supporting birds’ energy needs.
- Millet: White proso millet attracts a variety of ground-feeding birds such as juncos and doves. It is a staple in many birdseed mixes and is easily digestible, promoting healthy bird populations.
- Peanuts: Peanuts in the shell or as granules are appealing to jays, woodpeckers, and nuthatches. They provide a high-energy food source that supports birds during nesting and migration periods.
- Cracked Corn: Cracked corn is a good option for larger birds like pigeons and quail. It is an economical seed that can attract a variety of birds while also being suitable for ground feeding.
- Canary Seeds: These seeds are particularly attractive to finches and other small birds. High in protein and carbohydrates, they are often used in specialized bird mixes geared towards songbirds.
What Seeds Should Be Used to Attract Popular Backyard Birds?
To attract popular backyard birds, consider using a variety of seeds that cater to their dietary preferences:
- Sunflower Seeds: These are among the most popular seeds for a variety of bird species, including cardinals, finches, and chickadees. The high oil content makes them a nutritious option, and birds are often attracted to the large, easy-to-handle seeds.
- Safflower Seeds: Safflower seeds are especially favored by cardinals and chickadees, while being less appealing to squirrels. Their unique taste and smaller size make them a great choice for attracting specific bird species that may be deterred by other seeds.
- Niger Seeds (Thistle Seeds): These tiny seeds are a favorite among goldfinches and other small birds. Niger seeds are especially effective in tube feeders, where their small size prevents larger birds from eating them.
- Millet: White and red millet are excellent for attracting ground-feeding birds like juncos, doves, and sparrows. These seeds are often found in mixed birdseed blends and are particularly appealing to birds that prefer foraging on the ground.
- Peanuts: Whole or crushed peanuts are a high-energy food that attracts woodpeckers, blue jays, and nuthatches. They can be offered in feeders designed for peanuts, allowing birds to enjoy this protein-rich treat without competition from smaller species.
- Canary Seed: This seed is favored by finches and canaries, making it a great addition to your birdseed mix. Its small size and sweet flavor attract many small songbirds, enhancing the diversity of your backyard visitors.
- Cracked Corn: This seed is attractive to larger birds such as jays, doves, and even some mammals. It’s often used in ground feeders and can be a great way to keep larger birds happy while also drawing in various species.
Are There Specific Seeds That Draw in Less Common Bird Species?
Specific seeds can indeed attract less common bird species to birdhouses and feeders.
- Nyjer Seeds: Nyjer seeds are small, thistle-like seeds that are highly attractive to finches, especially the less common species such as Goldfinches and Pine Siskins. Their tiny size requires specialized feeders, which can help limit access to larger birds and create a more inviting environment for these smaller, more elusive species.
- Safflower Seeds: Safflower seeds are a great option to entice less common birds like Cardinals and Chickadees while deterring undesirable species such as squirrels and larger birds. These seeds have a hard shell that requires birds to exert more effort to crack, making them more suited for birds that are willing to work for their food.
- Hemp Seeds: Hemp seeds are rich in protein and fatty acids, making them attractive to a variety of birds, including less common species such as Grosbeaks and Sparrows. They can be offered in a mixed seed blend or in specialized feeders to provide a nutritionally rich option that many birds find appealing.
- Canary Seeds: While primarily used for pet birds, canary seeds can attract wild birds like Goldfinches and other small finches. Their sweet taste and nutritional content make them a favored choice among these species, particularly in areas where they are less commonly found.
- Millet: Small millet seeds are favored by a range of birds, including less common species such as Juncos and Sparrows. Offering millet in a feeder can diversify the bird species visiting your yard, as it is a common food source for ground-feeding birds that might not frequent traditional feeders.
When Is the Best Time to Use Seeds in Bird Houses?
The best time to use seeds in bird houses is influenced by the type of seeds and the birds you wish to attract.
- Spring: This is generally the optimal time to place seeds in bird houses as many bird species begin their nesting season during this period.
- Summer: While nesting may be winding down, summer is still a great time to provide seeds to support fledglings and adult birds during peak feeding times.
- Fall: As birds prepare for migration, providing seeds can help them build up fat reserves for their journey.
- Winter: Offering seeds during winter is crucial as food sources become scarce, helping birds survive the colder months.
Spring is generally the optimal time to place seeds in bird houses as many bird species begin their nesting season during this period. This is when you will see an increase in bird activity, and offering seeds can help attract them to your bird house for nesting purposes.
While nesting may be winding down, summer is still a great time to provide seeds to support fledglings and adult birds during peak feeding times. Birds are often busy raising their young and will appreciate easily accessible food sources to keep their energy up.
As birds prepare for migration, providing seeds in the fall can help them build up fat reserves for their journey. This is an important time to ensure that your bird houses are stocked with seeds that are high in fat and protein.
Offering seeds during winter is crucial as food sources become scarce, helping birds survive the colder months. Many birds rely on backyard feeders and houses to find the nutrition they need, making this an essential time for seed placement.
How Does Seasonality Impact Seed Choice for Bird Houses?
Seasonality plays a crucial role in determining the best seeds for bird houses, influencing the types of birds that visit and their dietary needs throughout the year.
- Spring Seeds: Spring is a time of renewal and migration for many bird species, making it essential to provide seeds that cater to these newcomers.
- Summer Seeds: In summer, birds require a high-energy diet to support breeding and feeding their young; therefore, seeds that are high in fat and protein are ideal.
- Autumn Seeds: As birds prepare for migration in autumn, they seek seeds that can help them build fat reserves, focusing on nutrient-dense options.
- Winter Seeds: During winter, when food is scarce, providing seeds that are rich in carbohydrates and oils can attract birds in need of sustenance to survive the cold months.
Spring Seeds: In spring, many birds return from migration and begin to nest, making seeds such as sunflower hearts and millet appealing options. These seeds are not only nutritious but also attract a variety of species looking to establish their territory and find mates.
Summer Seeds: For summer, seeds like safflower and thistle are beneficial as they provide essential fats and proteins needed for breeding birds and their chicks. These seeds ensure that adult birds have the energy required to forage and care for their young effectively.
Autumn Seeds: As autumn arrives, birds will actively seek out seeds such as pumpkin and corn that help them gain weight for migration. These seeds are energy-dense, allowing birds to stock up on necessary reserves before they migrate to warmer climates.
Winter Seeds: In winter, birds struggle to find food, so offering seeds like peanuts and suet can be crucial for their survival. These seeds are high in calories and provide the necessary energy to withstand colder temperatures, making them a vital resource for wintering birds.
What Seed Mixes Do Bird Experts Recommend for Bird Houses?
Bird experts recommend several seed mixes that attract a variety of birds to bird houses, providing them with the nutrition they need.
- Black Oil Sunflower Seeds: These seeds are favored by many species due to their high oil content and thin shells, making them easy to crack open. They attract a wide range of birds, including cardinals, chickadees, and finches, and are a staple in bird feeding.
- Nyjer (Thistle) Seeds: Nyjer seeds are tiny and high in fat, making them a favorite among finches, especially goldfinches and siskins. They are best offered in tube feeders with small holes to prevent larger birds from accessing them.
- Safflower Seeds: Safflower seeds are known for attracting cardinals and other birds while deterring squirrels and some undesirable species. Their tough shells require birds to have stronger beaks, which helps in attracting specific types of birds.
- Millet: Millet is a small seed that appeals to ground-feeding birds like juncos, sparrows, and doves. It can be mixed with other seeds or offered alone in platform feeders to attract a wide range of species.
- Peanuts: Peanuts, whether in-shell or shelled, are rich in protein and attract larger birds such as woodpeckers, jays, and nuthatches. They can be offered in feeders specifically designed for peanuts or scattered on the ground.
- Mixed Seed Blends: These blends often contain a variety of seeds, including sunflower seeds, millet, and corn, providing a diverse diet for many birds. The composition can vary, so selecting a high-quality mix with minimal fillers is essential for attracting a wide range of birds.
Are There Any Home-made Seed Mixes That Work Best?
There are several homemade seed mixes that are particularly effective for attracting birds to birdhouses.
- Sunflower Seeds: These are a favorite among many bird species, including cardinals, chickadees, and finches. Sunflower seeds are high in fat, providing essential energy for birds, especially during colder months.
- Safflower Seeds: Known for their bitter taste that squirrels typically avoid, safflower seeds attract desirable birds like cardinals and nuthatches. They are a great option for those looking to minimize competition from unwanted visitors.
- Nyjer (Thistle) Seeds: These tiny, high-fat seeds are particularly appealing to finches, especially goldfinches and house finches. Nyjer seeds require a specific feeder with small openings, ensuring that only smaller birds can access them.
- Millet: This seed is popular among ground-feeding birds such as juncos and doves. White proso millet is particularly favored and can be mixed with other seeds to create a balanced diet for a variety of birds.
- Peanuts: Whole or shelled peanuts are an excellent source of protein and fat, attracting birds like blue jays and woodpeckers. It’s essential to offer unsalted peanuts to ensure the health of the birds visiting your birdhouse.
- Canola Seeds: These seeds provide a good source of energy and are often overlooked by many seed mixes. They attract a range of birds, especially during migration periods when food sources may be scarce.
What Common Mistakes Should Be Avoided When Choosing Seeds for Bird Houses?
When selecting seeds for bird houses, several common mistakes should be avoided to ensure the best results for attracting birds.
- Choosing Inappropriate Seed Types: It’s essential to select seeds that cater to the specific bird species you want to attract. Different birds have different dietary needs; for instance, finches prefer nyjer seeds, while cardinals are attracted to sunflower seeds.
- Ignoring Seasonality: Many people overlook the importance of season when choosing seeds. Some seeds are better suited for certain times of the year, and using the wrong type can lead to waste and discourage birds from visiting.
- Not Considering Seed Freshness: Fresh seeds are crucial for attracting birds, as stale or old seeds lose their appeal and nutritional value. Always check the packaging date and choose seeds that are within their optimal usage period.
- Neglecting Local Wildlife: It’s important to research the local birds in your area before selecting seeds. Using seeds that are not native or common in your region can result in fewer visits from birds, as they may not recognize or prefer those seeds.
- Overlooking Seed Quality: The quality of the seeds matters significantly; low-quality seeds can contain fillers or be contaminated with weeds. Always opt for reputable brands that offer high-quality, clean seeds to ensure a healthy feeding environment.
Which Seeds Are Potentially Dangerous for Birds?
Some seeds can be harmful to birds if ingested, and it’s important to be aware of them when providing food. The potentially dangerous seeds include:
- Avocado Pits and Skin: The pit and skin of avocados contain persin, a substance that can be toxic to birds. Ingesting these parts can lead to respiratory distress and even death in some bird species.
- Cherry Pits: Cherry pits contain cyanogenic compounds which can release cyanide when metabolized. While a bird would have to consume a large number of pits to experience toxicity, it’s still best to avoid feeding birds any part of the cherry, including the pits.
- Peach Pits: Similar to cherry pits, peach pits also contain cyanogenic glycosides. The flesh of the peach is safe, but the pit can pose a risk if birds crack it open and ingest the contents.
- Tomato Seeds: Tomato seeds contain solanine, a toxic alkaloid that can be harmful to birds. While the ripe fruit is generally safe, the seeds should be avoided to prevent potential poisoning.
- Rhubarb Leaves: Rhubarb leaves are highly toxic due to their high levels of oxalic acid. Birds that nibble on these leaves can suffer from severe digestive issues and other health problems.
- Nightshade Berries: The berries from nightshade plants contain solanidine, a toxic alkaloid. Birds consuming these berries can experience various symptoms of toxicity, making them a risky choice for feeding.