Tuesday, March 22, 2022

Raven or Crow?

A black bird lands on your backyard fountain. Is it a raven or a crow?

courtesy of K. Meyer

There are a couple of physical traits I look for to help me make the identification:

Size - Is the sitting bird generally the size of an 8"x11" piece of paper from its feet to the top of its head? Or is it smaller? Ravens are big birds. Crows are medium-sized birds. But size can be tricky without something to use for comparison. 

Wing to Tail - When perched, a raven's folded long wings will reach nearly to the tip of its tail. A crow's wings are shorter, proportionately, so the tail appears longer. In the photo above, the bird's wing tips almost reach to the tail. Hmm

Beak - Both crows and raven have feathering onto the upper edge of their beak. The beak of a raven however is large and thick. Its also longer than the head. A crow's beak is long, but not longer than the depth of the head.

Throat - Ravens have shaggy looking feathers under their throats. They can fluff up their throat feathers. They also can hold those feather smooth to the body. The raven, pictured at right, has its throat feathering fluffed up while calling to a mate.

Stance - When sitting, a raven's tail and wings tend to stick down well below their perching feet. Notice in the raven to the right, that the tail is hanging long below the branch. A crow's tail is less long. When sitting, the crow's tail is not far below the feet. See crow below.

Crows also have a greater tendency to flick their tail and wings while sitting. (Notice how the crow's beak is as long as the head is wide.)

So the question remains. Is the bird on the fountain a raven or a crow? It's a raven.

There are differences when these birds are in the air, too. More on that later.

To really get an understanding of the size, see a blue bird on the same fountain.

More on crow behavior

More on raven behavior


Tuesday, January 25, 2022

New Birds in Your Yard?

I don't know why, but today new birds were showing up in my yard and in the yard of friends. In both cases the newcomers were at water features.

This lovely photo taken by our friend Kathy shows the two western bluebirds (Stalia mexicana) drinking from her fountain. The male is at the top and the female is in the top tier of the fountain. (I love the house finch that is down at the right looking up at the new visitors. You can really see that the bluebirds are bigger than the house finch (Haemorhous mexicanius).

Bluebirds are cavity nesters. They would like to move into a nest in a tree trunk created by a woodpecker. Bluebirds can't create the cavity themselves, so they are dependent on older trees with abandoned cavities. That is hard real estate to find in a sprawling city like Los Angeles. Nest boxes, however, can make all the difference in the world for these birds. Across the U.S., bluebirds depend on nest boxes to raise their chicks.

Learn more about bluebird nest boxes, including plans for one you can build at Audubon: https://www.audubon.org/news/how-build-bluebird-nest-box

We also had new visitors; a pair of northern flickers (Colaptes auratus). Interestingly the female was a western red-shafted subspecies and the male was a yellow-shafted subspecies, typically seen more to the north and east. They came and sipped water from our fountain with their long tongues used for eating ants.

You don't have to put out birdseed to attract birds. Especially in Southern California, water is an important resource for wildlife.

While we had December rain, the past few days have been dry and windy. Both the bluebirds and the flickers were attracted to flowing water in fountains. In the morning our fountain is frequently visited by hummingbirds, warblers, finches, and on occasion a Cooper's hawk (like the one pictured).

A water feature doesn't have to be big to be important to birdlife; it just has to be clean and reliable. Provide water in your yard or on a balcony and you might be surprised who comes to visit.