Paul Barrett shared some information with me relating to bird diet. It is very interesting to find that some birds stick to mostly the same foods while others have quiet a varied diet. While reading about the diet of Icteridae, I found they follow something of a Canada Food Guide diet composed of meats and alternatives (insects and small aquatic life) fruits, seeds, and grain. I would like to thank Paul for the following information:
Note: It was impossible to cut and paste the info into this program. Next time I will have to type it to maintain consistent formating.
(adjective) Describes a diet that consists primarily of insects, including aquatic insects, ants and spiders. Many birds have at least a partially insectivorous diet, and insects are a critical source of protein for many growing nestlings. While young birds are still dependent on their parents for food, they may be fed mostly insects, even if their mature diet will be much different. To be considered insectivorous, a bird does not necessarily need a diet of exclusively insects, but the insect proportion is quite significant.
Granivorous (a.k.a Seed-Eating, Granivore (noun)
(adjective) Describes a diet that consists primarily, though not exclusively, of seeds and grain. This is the primary diet for many types of birds, especially game birds, sparrows and finches. Granivorous birds can also eat other things, and many species will consume insects as a source of protein for growing chicks during the nesting season.
Frugivorous (a.k.a. Fruit-Eating, Frugivore (noun)
(adjective) Describes a diet that consists primarily (though not necessarily exclusively) of fruit, including tree fruits such as bananas, apples, pears and oranges as well as berries. Frugivorous birds often have specialized bills to help them eat fruit most efficiently by cutting through or removing the skin, husk or hull of preferred fruits."
Not all birds have so much variety in their diet as this family of birds. In all likelihood, these Rusty Blackbirds located themselves close to water with plenty of insects as that is their primary diet while breeding and raising their young. As I report of other species in upcoming posts, I will share more of the diet information specific to those birds.
I thank Paul for sharing this info and invite anyone who would like to provide a bird report or share some information to consider this forum as a possible place to do that.