Saturday, December 21, 2019

Sunflower seeds & white proso millet attract the most birds!

An article published in the Wildlife Society Bulletin in 2014 (abstract) studied the bird seed preferences of backyard birds at feeders in the United States and Canada from 2005-2008. The 4 year study at 173 backyard bird feeders came to this conclusion:

Three types of bird seed items attract the most wild birds:
  1. Black oil sunflower seeds 
  2. Sunflower chips and niger seed
  3. White proso millet
Unfortunately, many wild bird seed mixes contain less than half of these items by weight. Half the seeds in some mixes are basically "chicken scratch" that backyard birds don't eat. You'd be better off to pay twice as much to purchase black oil sunflower seeds and white proso millet separately.

But this isn't "news." A study in 1980 revealed the same thing. Yet many bird seed providers still offer up "bargain" mixed birdseed with worthless filler.



What type of bird seed attracts the most birds?


In the article referenced above (full citation immediately below), the authors examined 10 seeds commonly found in mixed bird food blends. They then offered these seeds individually in different types of feeders.


[David J. Horn, Stacey M. Johansen, and Travis E. Wilcoxen, 2014, Seed and Feeder Use by Birds in the United States and Canada, Wildlife Society Bulletin, Volume 38, Issue 1, pages 18–25.]


It's no surprise that black oil sunflower seeds top the list of favorite bird seeds. This bird food is well-known to attract many birds. This is the special favorite of larger finches (house finches), cardinals, chickadees, and nuthatches.

Hulled sunflower seeds (also known as hearts or kernels) that are broken into smaller pieces (as sunflower chips) are a favorite of smaller finches including goldfinches, redpolls and pine siskins. The seeds of the niger plant (trademarked as Nyjer) and often sold as "thistle," is similarly sought out by these same small finches.

White proso millet is the favorite food of ground-feeding sparrows, juncos, mourning doves, and red-winged blackbirds. Unfortunately, however, millet is also the favorite of house sparrows and brown-headed cowbirds, two species that are viewed as pests by some as they can be harmful to other birds.

Of course, birds will eat many other items. But given a choice, most birds will choose sunflower seeds, niger, and white proso millet over other options.

Cheaper mixed bird seed blends have a high volume of "filler" seed. These seeds are cheaper, as they are used in the poultry industry and available at lower cost. It is noteworthy that no backyard birds prefer red milo (sorghum) or safflower seeds. Only one bird, the common grackle, prefers cracked corn. All three of these items are commonly used in cheap bird seed mixes.

Photo of cardinal and chipping sparrows at seed feeder
Chipping Sparrows and Cardinal
Image from Pixabay by GeorgeB2

What seeds are in wild bird seed mixes, and what do birds actually like?


More information of the above article is on the Project Wildbird website (source).

The 10 types of seeds found in bird seed mixes for this study included:

Black oil sunflower
Hulled sunflower (fine sunflower chips and medium sunflower chips)
Striped sunflower
Cracked Corn
Niger
Red milo (sorghum)
Safflower
Whole peanut kernels (out of shell)
White proso millet

This study is similar, if more extensive, than one published in 1980 for the US Department of the Interior (Special Scientific Report--Wildlife No. 233) by Aelred D. Geis. It is titled: "Relative attractiveness of different foods at wild bird feeders." (source)

Geis compared different foods to regular striped sunflower seeds and white proso millet, common items in wild bird seed mixes that most birds eat.

Geis found that, for instance, American Goldfinches preferred hulled sunflowers (whole kernels or broken chips), niger seed ("thistle"), and black oil sunflower seeds more than regular striped sunflower seeds. The goldfinches did not eat the white proso millet.

Cardinals preferred black oil sunflower seeds over other types of sunflowers, but liked sunflower seeds of all types, and would eat a wide variety of other seeds, as well.

Blue Jays liked whole peanut kernels and striped sunflowers.

House Finches like black oil sunflower seeds, preferring them twice as much as their next choices of striped sunflowers and hulled sunflowers.

White-crowned and White-throated Sparrows liked black oil sunflower seeds and white proso millet.

Song Sparrows and Dark-eyed Juncos preferred white proso millet.

So, knowing that most birds want to eat black oil sunflower seeds and white proso millet above all else, what do bird seed providers put in their wild bird seed?

Milo.

Not just milo, but other seeds that backyard birds don't eat.

Seeds found in wild bird seed mixes that most backyard birds don't eat:

Buckwheat
Canary seed
Cracked corn
Flax
German millet
Red millet
Japanese millet
Red milo (sorghum)
Oats hulled
Oats whole
Rape seed
Rice
Wheat

What is the best bird seed mix?


The best bird seed mix is none. Skip the commercial birdseed mixed blend and feed birds what they want!

Put one type of seed in each separate feeder!

Finches and nuthatches like black oil sunflower seeds. They prefer raised tube feeders.

Sparrows and juncos like white proso millet. They like low platform (tray) feeders or even eating on the ground.

Goldfinches and siskins like niger seed ("thistle") in a special thistle sock.

If you want to offer your backyard birds generic mixed seed, I'd put it in a small hopper feeder or a low platform feeder. As soon as the black oil sunflower seeds are gone, though, so will be many other birds except for juncos and sparrows. I'd have a second feeder--a tube feeder--dedicated to black oil sunflower seeds for the finches, cardinals, chickadees, nuthatches and other birds.

If you have lots of quail and mourning doves, though, cheap bird seed with lots of red milo on a low platform feeder may be ideal.

A comparison of bird seed ingredients and ratios


Christopher Ingraham investigated different bird seed mixes for an article in the Washington Post (source). He went to local stores in Minnesota, including Wal-Mart, and carefully measured the seeds himself. Here's what he found:

Wild Bird Seed Economy Mix
Black oil sunflower (none)
White proso millet 12%
Filler: 88%, including 74% red milo, some wheat and some cracked corn

Royal Wing Splendid Blend
Black oil sunflower 3%
White proso millet 18%
Filler: 78%, including 60% red milo and 18% wheat

Pennington Classic Wild Bird Feed
Black oil sunflower 17%
White proso millet 29%
Filler: 55%, including 46% red milo and some wheat

Our Family Wild Bird Seed
Black oil sunflower 14%
White proso millet 29%
Filler: 57%, including 43% red milo and 14% cracked corn

Harvest Songbird blend
Black oil sunflower 42%
Striped sunflower seeds and sunflower chips 14%
White proso millet 23%
Filler 21%, including 14% red milo and 7% safflower

Pennington Waste Free Bird Seed
Hulled sunflower chips 52%
White proso millet 26%
Fruit and nuts 6%
Filler: 16%, including cracked corn and canary grass (NO red milo!)

When you purchase at the store


When purchasing at the store look at the seed. The Harvest Songbird blend is nearly half (40%) black oil sunflower seeds and that plastic bag should look quite black through the transparent sections. A good product!

You should always read the ingredients. That Pennington's Waste Free brand has no milo. And though you won't see any black hulls of the black oil sunflower seed, you will read that its very first ingredient will be sunflower chips. A good bird seed!

If the first ingredient is milo (sorghum) move on.


Photo of bird seed bag list of ingredients

Milo is the first listed ingredient. Don't buy!
Click to enlarge

What I saw in the bird food department at Wal-Mart


Back in August I went to Wal-Mart to see what kind of bird foods they offered. Our yard is landscaped gravel and cement sidewalks with only a few succulents in pots. Marlene and I were looking for a no-waste/no-mess bird seed. I took lots of photos with my phone. But I must admit that I'm not any good at using my phone camera--I'm too self conscious!

My first photo is the ingredients list of a Pennington bird seed. It has very few black oil sunflower seeds and lots of milo and millet visible. My photo doesn't show the brand, but the fact that milo is listed as the first ingredient, it must be the Pennington Classic. Don't buy.

Another photo shows a Premium Finch Lovers Blend by 3-D Pet Products. It is sunflower kernels and niger seed. This is perfect in a tube feeder for goldfinches, house finches, chickadees and nuthatches! It was 13.8 cents an ounce, so more expensive by weight, but less than $11 for 5 pounds. Seems like a good deal.

I was interested to see Harvest Seed & Supply Mealworm Medley. It advertises as attracting bluebirds and "rarely-seen songbirds." It might. The ingredient list starts out with black oil sunflower seed, millet, safflower seed, chipped sunflower seeds, striped sunflower seeds, peanuts, dehydrated mealworms. The final ingredient is milo. Since it is listed last, I believe that it should be the least common ingredient. I might just put out mealworms for bluebirds, though. The other ingredients are found in most mixed bird seed blends.

Harvest Seed & Supply also has a No Waste Wild Bird Food. It's half the price of the Finch Lovers Blend. Let's see what ingredients it has. Dehulled sunflower seeds. Evidently "dehulled" is the same as "hulled"! Millet is next, peanuts, canary seed. I can't look through the bag to see but it must be similar to the Pennington Waste Free Bird Food. Seems a good choice for attracting a wide variety of birds for non-messy bird feeding.

Next was the 3-D Premium Nut N' Berry. Sunflower kernels, peanuts, sunflower seed, safflower seed, pistachios, hulled pumpkin seed, dried raisins (isn't that the definition of raisins?), and dried cranberries. Hmm, seems like a good trail mix rather than bird food! More for larger finches, grosbeaks, cardinals, and jays. The sparrows, towhees, and juncos get left out.

Photo of bird seed bag in storage container
Seed fits in storage container to keep fresh in and pests out
We finally ended up with the 3-D Zero-Waste Deck, Porch N' Patio. That's where we hung our new feeder--from our bedroom window awning over the patio sidewalk. The ingredients list is sunflower kernels, peanuts, pistachios, and hulled pumpkin seeds. That's okay for larger finches. We only have House Finches (and a Black Phoebe at our bird bath). We could get Lesser Goldfinches if we put up a thistle sock, but niger seed is too messy for our yard. This choice would not attract sparrows. On the other hand, it also does not attract House Sparrows. We don't have many in the area... and would like to keep it that way, as they are a bit messy and aggressive.

Photo of patio bird feeder hanging from awning
Our patio bird feeder with no-mess seed
The feeder we bought (not a large choice in San Diego in summer) was more decorative than functional, however. It was a pretty Stokes brand glass tube feeder with small tray at the base. Unfortunately the seed is too large. Peanut and pistachio pieces get stuck in the opening and we have to unclog it. But, hey! The few birds we do have in our yard did come to the feeder. The House Finches did tend to throw out some of the peanuts in order to get to the sunflower pieces. A ground squirrel cleaned up the sidewalk. So, no mess! Kind of. If we had tree squirrels instead of fence lizards, though, we might not be so happy.



Have you read this related post?: Why don't birds come to my feeder?



Buy bulk and save!

Wagner's 25 pounds: black oil sunflower seeds Medium sunflower chips: 50 pounds: No waste/No mess! Mix your own sparrow feed: 50 pounds: White Proso Millet

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