Just cut an orange in half, and set the halves on a deck railing or flat feeder, or tie them on a tree branch. This is because when leaves emerge, so do lots of insects. Songbirds may fuel their migration by following the leaf-out, and eating the millions of insects available at that time. With your help, we'd like to test whether these spring events are inter-related. Here are a few possibilities Orioles do most of their singing on their breeding grounds, and are quieter on their wintering grounds.
Orioles build nests on their breeding grounds.
They don't do this anywhere else. Orioles eat many more insects on their breeding grounds, and much more fruit and nectar in the tropics. They need lots of protein to make eggs and feed growing babies. How to Respond to Today's Challenge Question 1. Copyright 1999 Journey North.