Yellow billed cuckoo.

Rondeau Provincial Park, Ontario, Canada, May 17, 2025.
An unusual visitor to our yard.
We hear them frequently but rarely see one particularly in the open.

Coccyzus americanus

Yellow-Billed Cuckoos don’t lay their eggs all at once: the period between one egg to the next can stretch to as long as five days. This “asynchronous” egg laying means the oldest chick can be close to leaving the nest when the youngest is just hatching. When food is in short supply the male may remove the youngest bird from the nest, though unlike their relative the Greater Roadrunner, they don’t feed them to the older siblings.