Definition

Noun: A short, distinctive vocal sound made by a bird, consisting of two distinct pitches or tones produced in sequence. This term specifically describes a simple birdcall pattern.

Examples

• The clear two-note call of the cuckoo is a classic sound of spring in many European forests.
• Birdwatchers often identify the chickadee by its familiar two-note call.
• We heard a repeated two-note call from the treetops but couldn't spot the bird making it.

Advanced Usage

• In ornithology, a two-note call is often contrasted with more complex songs or multi-note calls used for different purposes like mating or territorial defense.
• The phrase can be used descriptively beyond strict ornithology to describe any similar sound:

Variants and Related Words

• Birdcall (n): The general sound made by a bird.
• Song (n): A longer, more complex series of notes often used by birds for mating or territory.
• Chip (n): A very short, single-note birdcall.

Synonyms

• Double-note call
• Two-tone call

Related Phrases

• Distinctive call: A call that is easily recognized.
• Repeated call: A call that is made over and over again.

Noun

1. a birdcall having two notes
   • the two-note call of the cuckoo