Category Archives: Songbirds

The Hard To Find Aki’

Akiapola’au, October 2015 (photo by Aaron Budgor on Flickr)

The akiapola’au (Hemignathus wilsoni), or aki’, is a Hawaiian honeycreeper with such a small population and such a restricted range that he may well go extinct in this century. He’s hard to find, of course, but he’s well worth the effort.

The aki’s beak is most unusual but it’s perfect for gathering what he eats. He probes for spiders, beetles and caterpillars and, like a sapsucker, he drills rows of holes in an “aki’ tree” and returns when the sap wells up.

Despite his similar food requirements the aki’ doesn’t have a woodpecker beak. Instead his lower mandible is short and straight with a chisel tip while his upper mandible is long and thin, curved down, and flexible.

Each half of his beak has a different purpose. He chisels and pecks with the lower mandible or props it in place while he probes and scrapes with his upper mandible. As you can see in the top photo, there’s even a small gap between the two mandibles. How strange!

Aki’ in profile, January 2014 (photo by Bettina Arrigoni on Flickr)

The males and females forage in different micro habitats. The females look similar, though paler.

Aki’, March 2015 (photo by Eric Gropp on Flickr)

The aki’ is listed as Endangered for good reason. His population is small and declining. As of 1995 there were only 800 individuals left on Earth, scattered in severely fragmented areas in the mountains above 5,000 feet.

Many things contribute to the aki’s decline including habitat loss from logging and farming and predation by introduced species, especially rats, cats and dogs. The aki’ is also threatened by avian diseases carried by mosquitoes; Hawaiian birds have no immunity to them. The mosquitoes, accidentally introduced to Hawaii beginning in 1826, cannot live in the cold climate above 5,000 feet. That’s why Hawaiian honeycreepers like the aki’ still survive there.

Unfortunately climate change is warming the Hawaiian mountains and the mosquitoes are moving up. How long will we still be able to find this beautiful bird with such an unusual beak?

(photos on by Aaron Budgor, Bettina Arrigoni and Eric Gropp via Flickr Creative Commons license. click on the captions to see the originals)

Tour Day 7: Mauna Kea, Saddle Road, the Big Island, Hawaii

p.s. I saw an aki’ yesterday. Yay!

Red Birds, Curved Beaks

I’iwi on ohi’a tree (photo by Gregory (Slobirdr) Smith on Flickr)

Today our VENT birding tour has special permission to enter the Hakalau Forest National Wildlife Refuge on the eastern slope of Mauna Kea where there are more native birds than anywhere else on the islands. We’re going to see a lot of birds and a lot of them are endangered.

The refuge, founded in 1985 to protect Hawaiian rainforest birds and their habitat, is closed to the general public because the ohi’a trees (pictured above) are dying of a fungus that’s spread too easily by humans. Rapid Oh’ia Death kills the trees within a few days or weeks. Hundreds of thousands of trees have died since 2013. This is especially scary because the ohi’a is the most common native tree and so many birds rely on it. Many of them have unusual beaks.

The I’iwi (Drepanis coccinea), at top and below, is nearly the same color as ohi’a flowers. Vermilion red with a decurved bill that’s perfect for probing flowers and sipping nectar, he perches like a songbird or hovers like a hummingbird. He was so common when Polynesians first arrived in Hawai’i that they made his feathers into royal cloaks.

I’iwi feeding on nectar (photo by Robin Agarwal on Flickr)

The ‘apapane (Himatione sanguinea), below, also feeds on ohi’a flowers and is red and black like the i’iwi. However his color is scarlet, his undertail coverts are white, and his dark bill has a gentle curve.

‘Apapane (photo by Bettina Arrigoni on Flickr)

The Hawai’i akepa (Loxops coccineus) is a tiny orange-red bird with brownish primaries. This endangered crossbill feeds on spiders, insects and nectar in the ohi’a forest. Yes, his bill is curved and crossed!

Akepa (photo by Bettina Arrigoni on Flickr)

And finally, the Hawai’i amakihi (Chlorodrepanis virens) is certainly not red but he has a curved beak that’s useful for gleaning, probing, and sipping while he eats spiders, insects, sap, nectar and fruit. He’s a versatile bird whose population is doing quite well with 800,000 to 900,000 on the islands.

Hawaii amakihi (photo by Bettina Arrigoni on Flickr)

What do these birds have in common other than their curved beaks? They are all Hawaiian honeycreepers.

(all photos are Creative Commons licensed. i’iwi at top by Gregory (Slobirdr) Smith on Flickr, i’iwi at yellow flowers by Robin Agarwal on Flickr, ‘apapane, akepa and Hawaiian amakihi by Bettina Arrigoni on Flicker)

Tour Day 6: Hakalau Forest National Wildlife Refuge on the island of Hawai’i

Introduced

Red-crested Cardinal at Koke’e State Park, Hawaii (photo from Wikimedia Commons)

As I mentioned yesterday, our Hawaiian tour checklist has 108 birds on it of which 46 are introduced. Yes, 42% of the birds we expect to see would not be in Hawaii if people hadn’t brought them there.

The red-crested cardinal (Paroaria coronata), above, is one of them. A member of the tanager family native to northern Argentina, Bolivia, southern Brazil, Paraguay and Uruguay in South America, he was introduced to Hawaii in 1928. Being a land-based bird, he was stuck on the islands as soon as he got off the boat but he’s made himself at home in disturbed habitats and urban parks. Fortunately he’s not considered invasive so I’ll be happy to see him in Hawaii.

On the other hand, two bulbul species introduced to Hawaii in the 1960’s are not a happy sighting. Both have become invasive.

The red-vented bulbul (Pycnonotus cafer) is a prolific resident breeder of the Indian subcontinent who’s been introduced in tropical areas around the world. On the Pacific islands he’s become invasive and is now one of the world’s 100 worst invasive species — a dubious distinction.

Red-vented bulbul (photo from Wikimedia Commons)

Red-vented bulbuls are easily found in urban Honolulu.

Red-vented bulbuls in Honolulu (photo by Forest and Kim Starr via Wikimedia Commons)

The red-whiskered bulbul (Pycnonotus jocosus) is a fruit-eating bird of tropical Asia who’s not in the top 100 pests worldwide, but he’s invasive in Hawaii.

Red-whiskered bulbul (photo from Wikimedia Commons)

The two bulbul species made a difference in a very short time. According to Wikipedia, they changed the color of monarch butterflies in Hawaii over a period of just 20 years. The bulbuls prefer to eat orange-colored monarchs so orange ones are scarce now and white morphs are common.

(photos from Wikimedia Commons; click on the captions to see the originals)

Tour Day 1: Honolulu

Named For His Crest

Brahminy starling in India (photo by Allan Hopkins on Flickr, Creative Commons license)

The brahminy starling (Sturnia pagodarum) from the Indian subcontinent was named for his black crest because it resembles the sikha hairstyle worn by Brahmins. He looks like a Brahmin when his feathers are at rest (above).

However, he raises his head feathers frequently.

Brahminy starling at Gilgit-Baltistan, Pakistan (photo by Imran Shah on Flickr, Creative Commons license)

Watch his crest as he sings in this video.

He’s a pushy bird whose shape, behavior and song remind me of our European starlings (Sturnus vulgaris). He’s not in the same genus … but close.

(photo by Allan Hopkins on Flickr, video by Jerubal on YouTube)

How Many Blue Jays?

Great Backyard Bird Count 2019

In the winter of 2012 Pittsburghers noticed we had very few blue jays in our area. It was such a mystery that I posted an article in February asking folks to tell me if they’d seen any blue jays lately. Seven years later the responses are still coming in.

Most people respond when they don’t see any blue jays because they miss them. It turns out that blue jay frequency varies throughout the year and can drop locally when the habitat changes, especially if oaks are cut down. (Blue jays rely on acorns.)

Our blue jay count surges during spring and fall migration because a lot of them breed north of us. In Allegheny County (Pittsburgh) there’s also a mysterious mini-surge every year in mid February. What’s that about?

eBird frequency of blue jays in Allegheny County, PA, 2014-2019

See seven years of blue jay reports and musings at Have You Seen Any Blue Jays Lately?

Count your own blue jays during the Great Backyard Bird Count this weekend. How many birds will you find?

(image credits: Great Backyard Bird Count poster, eBird report on frequency of blue jay sightings in Allegheny County, PA, 2014-2019; click on the captions to see the originals)

Brazen In Winter

Northern mockingbird blocks a northern cardinal (photo by Marge Van Tassel)

This week I wrote about northern mockingbirds having knock-down drag-out fights during the breeding season. Did you know that mockingbirds are also territorial in the winter? Even though they’ve migrated far from their breeding territory they vigorously defend their wintering zone.

Last winter Marge Van Tassel had a pushy mockingbird in her Armstrong County yard. She sent this photo saying, “The male of the pair in our yard chased all birds away from the food bowl last year when he was in it. He even chased this female cardinal back to a bush.”

Yikes! She’s putting on the brakes with her tail.

Mockingbirds are brazen, even in winter.

(photo by Marge Van Tassel)

The More The Merrier

Eurasian tree sparrow, great tit and blue tit at a feeder in Bulgaria (photo from Wikimedia Commons)

Squirrels eventually figure out a puzzling bird feeder, but have you ever noticed that birds do too? Lone songbirds usually can’t do it, but scientists have proven that a flock can. The bigger the flock the better.

I learned this years ago when I set up a “goldfinch-only” thistle feeder whose holes forced birds to perch upside down to eat the seeds. This is easy for American goldfinches but not for the birds I meant to foil — house sparrows. Lone house sparrows gave up on this feeder but the flock tried a lot of methods. A few of them would land right-side up and slowly fall forward until they were upside down. One of them put out his wing to grab the feeder. The rest of the flock followed.

On Throw Back Thursday, learn how songbird flocks can solve puzzles faster than individuals in this vintage article: Two Heads Are Better Than One.

The more birds at our feeders the merrier we are … and so are they.

(photo from Wikimedia Commons; click on the caption to see the original)

Knock Down, Drag Out: Mockingbirds Fight

  • Northern Mockingbirds fighting #1 (photo by Beth Signorini)

In case you think that songbirds are innocent, meek creatures consider the northern mockingbird (Mimus polyglottus). He always has “attitude” and he’s willing to engage in a knock down drag out fight.

Beth Signorini captured these two during the breeding season.

I wonder who won.

(photos by Beth Signorini)

Eating Crow?

Evidence of a peregrine meal. What is it? (photo by Kate St. John)

Early this month when Bob Mulvihill stepped out on the ledge to clean the Cathedral of Learning falconcams, he found this evidence of a peregrine’s meal. What species is it? Did the peregrines eat a crow?

The remaining head feathers are black and slightly iridescent. The beak is big and a bit down-curved. The feet look rather large for the bird’s body. Obviously the bird has plastic color-bands but there was no USFW band on its right leg so there’s no way to trace it.

Here’s a closer look:

Crow beaks are 2.5 inches long. How long is the beak on this bird? Less than 1 inch.

The iridescent head feathers and slightly down-curved one-inch bill point to a common grackle rather than a crow.

I’m still not sure what this bird was, but I do know the peregrines did not eat crow. 😉

(photos by Kate St. John)

Orange House Finch

A normal house finch with an orange one (photo by Marcy Cunkelman)

House finches normally have rosy red foreheads, chests, and rumps but occasionally you’ll see an orange one. He’s not a new species, he’s just a color variant.

The orange color might be temporary. Depending on what the house finch eats he could be red next year.

Find out how this happens in this vintage article entitled “Orange?

(photo by Marcy Cunkelman)