Answers are grounded in this paper and cite their sources.
Blue jays trained to detect Catocala moths in slides were exposed to two types of slide series containing these moths: series of one species and series of two species intermixed. In one-species series, detection ability increased with successive encounters with one prey type. No similar effect occurred in two-species series. These results are a direct demonstration of a specific search image.
No takes yet. Share an insight, caveat, or question.
Pietrewicz et al. (1979) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: