diurnal birds of prey, notably the falcons and caracaras. They differ from hawks, eagles, and kites in that they kill with their beaks instead of their talons. Six species have been recorded in Wyoming. Crested caracara, Caracara plancus (A) American kestrel, Falco sparverius Merlin, Falco columbarius Gyrfalcon, Falco rusticolus (A) Peregrine falcon, Falco peregrinus Prairie falcon, Falco mexicanus Tyrant flycatchers Order: PasseriformesFamily: Tyrannidae Tyrant flycatchers are Passerine birds which occur throughout North and South America. They superficially resemble the Old World flycatchers, but are more robust and have stronger bills. They do not have the sophisticated vocal capabilities of the songbirds. Most, but not all, are rather plain. As the name implies, most are insectivorous. Twenty-one species have been recorded in Wyoming. Ash-throated flycatcher, Myiarchus cinerascens Great crested flycatcher, Myiarchus crinitus (A) Cassin's kingbird, Tyrannus vociferans Western kingbird, Tyrannus verticalis Eastern kingbird, Tyrannus tyrannus Scissor-tailed flycatcher, Tyrannus forficatus (A) Fork-tailed flycatcher, Tyrannus savana (A) Olive-sided flycatcher, Contopus cooperi Western wood-pewee, Contopus sordidulus Eastern wood-pewee, Contopus virens (A) Alder flycatcher, Empidonax alnorum (A) Willow flycatcher, Empidonax traillii Least flycatcher, Empidonax minimus Hammond's flycatcher, Empidonax hammondii Gray flycatcher, Empidonax wrightii Dusky flycatcher, Empidonax oberholseri Cordilleran flycatcher, Empidonax occidentalis Black phoebe, Sayornis nigricans (A) Eastern phoebe, Sayornis phoebe Say's phoebe, Sayornis saya Vermilion flycatcher, Pyrocephalus rubinus (A) Vireos, shrike-babblers, and erpornis Order: PasseriformesFamily: Vireonidae The vireos are a group of small to medium-sized passerine birds. They are typically greenish in color and resemble wood warblers apart from their heavier bills. Nine species have been recorded in Wyoming. White-eyed vireo, Vireo griseus (A) Bell's vireo, Vireo bellii (A) Gray vireo, Vireo vicinior Yellow-throated vireo, Vireo flavifrons (A) Cassin's vireo, Vireo cassinii Blue-headed vireo, Vireo solitarius Plumbeous vireo, Vireo plumbeous Philadelphia vireo, Vireo philadelphicus Warbling vireo, Vireo gilvus Red-eyed vireo, Vireo olivaceus Shrikes Order: PasseriformesFamily: Laniidae Shrikes are passerine birds known for their habit of catching other birds and small animals and impaling the uneaten portions of their bodies on thorns. A shrike's beak is hooked, like that of a typical bird of prey. Two species have been recorded in Wyoming. Loggerhead shrike, Lanius ludovicianus Northern shrike, Lanius borealis Crows, jays, and magpies Order: PasseriformesFamily: Corvidae The family Corvidae includes crows, ravens, jays, choughs, magpies, treepies, nutcrackers, and ground jays. Corvids are above average in size among the Passeriformes, and some of the larger species show high levels of intelligence. Nine species have been recorded