Avian Response to Changing Seasons Common Poorwill.

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Presentation transcript:

Avian Response to Changing Seasons Common Poorwill

Avian Response to Changing Seasons Grace’s Warber American RobinWhite-Breasted Nuthatch

Avian Response to Changing Food Supply

Avian Response to Drought, Flooding

“Extreme Migration”

“Neotropical Migrants” Wood WarblersOrioles Grosbeaks Hummingbirds Tanagers Vireos Flycatchers Hawks Vultures

“Neotropical Migrants” Blackpoll Warbler

“Short-Distance Migrant” Brewer’s Sparrow

“Vertical Migration”

Fig in Podulka et al MIGRATION STRATEGIES

4 5 1) Obligate Annual Migrants (e.g., Neotropical Migrant) Bird Migration Strategy:

20 21 Migratory Strategy: 2) Permanent Resident

35 36 Facultative and Obligatory Partial Migrants Obligatory Facultative Bird Migration Strategies 3 & 4:

18 Bird Migration Strategy 5: Irruptive Migration

11 12 Bird Migratory Strategy 6: Nomadic Migration

Fig in Podulka et al. 2004

20 Origins of Migration? (Climatic Change) “Returning Home”

28 29 Origins of Migration? (Lack of Needed Resources)

26 Origins of Migration? (Seasonal Intraspecific Dominance Interactions) 27 Blackcap

Origins of Migration? (Seasonal Interspecific Dominance Interactions)

Origins of Migration? (Tracking of Fruit or Nectar)

Which Explanation is Most Plausible?

Situation OneSituation Two Resident Migrant Migration and Natural Selection

Migratory Flexibility Original, Sedentary Populations Introduction in 1950s

35 37 Genetic Basis for Migration?

Fig in Podulka et al Variation in Migratory Strategy in Blackcap Populations

Fig in Podulka et al Determining Migratory Direction via Migratory Restlessness

Fig in Podulka et al Results of Hybridization Experiments I

Fig in Podulka et al. Results of Hybridization Experiments II

1 ponderosa_pine_oregon_charlie_ott.jpg map-mid.jpg 5 Steller's_Jay as_Seen_from_the_Back.jpg/800px-Steller's_Jay_as_ Seen_from_the_Back.jpg

Owl-Rowley-MA-Posters.jpg Rowley-MA-Posters.jpg 20 _preview

lack-Chinned-Hummingbird.jpg Tanager9.jpg

33 america.jpg 34 Blue-winged%20Mountain%20Tanager.jpg 35 illa-1.jpg