A male Black-headed Grosbeak visited our sunflower bird feeder today. We were excited, because we are slightly out of their habitat. We are in the foothills of the mountains, in desert scrub. The Black-headed Grosbeak prefers a variety of deciduous and mixed forest habitats. We have some small deciduous trees and some short evergreens, but our yard could not be considered a forest habitat.
When the grosbeaks builds a nest they do their best to install air conditioning by making the bottom of the nest so thin that you will be able to see the eggs through the bottom of the nest and the best air circulation is available to the eggs and the parent bird. The thickness of the nest depends on the part of the country the nest is built in.
The female grosbeak is a true feminist. She expects the male to do about half of the work when it comes to incubating eggs and feeding young. If the male starts to spend too much time away from the nest, she will start singing. The male will then return thinking his territory has been invaded.
Attracting grosbeaks to your yard is as easy as providing food, water, and shelter. Grosbeaks will eat insects, seeds and fruits. The grosbeaks visiting our yard prefer sunflower seeds. They like our hopper / platform bird feeder. This feeder has a hopper in the middle of the platform. It is easy to keep full.
These birds seem to prefer our bird pond over our bird bath. They seem to prefer to be near the splash of the tiers, and are regular bathers.
Our yard does not have many of the large deciduous trees, but I have heard them singing from our 15-20 foot trees, although we have never found a nest.
In conclusion, you do not need the ideal habitat to attract Black-headed Grosbeaks to your yard. Provide the right type of food and some water and they will come.