08/16/2023
Whoops, July came and went without our monthly Bird Bio. A bit late, but hopefully you will find the Evening Grosbeak to be as interesting as they are beautiful.
The Evening Grosbeak is a beautiful Finch family Fringillidae. This name for the finch family consists of 17 varieties of birds that include this beauty. They have magnificent markings of black, gray and yellow, with white and black wings and are about the size of a Northern Cardinal. Their genus name is “Coccothraustes” which means “kernel-cracker”, no doubt referring to their powerful beak. The early settlers added “Evening” to the name Grosbeak by seeing them in the woods only after sundown.
They are a songbird without a song. Instead, its calls are piercing notes and burry chirps. They are year round residents to the northern regions of New Mexico and the Rocky Mountains.
The Grosbeak’s will flock together in the winter months typically in wooded, high elevated forest areas. A flock of Grosbeaks are called a Gross. In winter, flocking provides better luck finding food. When offering them food at your feeders, due to their size, a platform style feeder works the best, filled with black oil sunflower seed. They are more independent in the Spring and Summer months feeding on insects, including a serious forest pest; the Spruce Bud worm. This bird has an exceptionally keen ability to find this insect which has provided early detection of a possible infestation of this caterpillar in our forests today. Summer months also provide much fruit and berries from fruit trees and junipers. Whereas most birds like to eat the fruit of a cherry, the Grosbeak will target the pit and crushes it with its beak.
The flocks will break off into small groups during nesting season. They prefer to build nests high up in Spruce, Pine, Birch, and Maple trees. The nest is built mostly by the female from ground twigs and roots, lined with grasses and pine needles. It is a cup shaped 5x5 with a narrow inner cup inside of 3 inches across and 1 inch deep. The normal egg counts are 2-5, and are blue with brown markings. The incubation is 12-14 days. After 13-14 days following hatching, the young birds will fledge from the nest.
The longest known Evening Grosbeak was banded and found in New Brunswick at the age of 16 years old
Happy Birding!