Chickadee Species and Climate Change

Which two species of chickadees are commonly found in eastern North America?

• Gray-headed Chickadee and Siberian Chickadee

• Black-capped Chickadee and Carolina Chickadee

• Chestnut-backed Chickadee and Mexican Chickadee

• Mountain Chickadee and Boreal Chickadee

How can you differentiate between the calls of Black-capped and Carolina Chickadees?

• Black-capped Chickadees have a four-part call, while Carolina Chickadees have a two-part call.

• Both have identical calls.

• Black-capped Chickadees have a two-part call, while Carolina Chickadees have a four-part call.

• Carolina Chickadees have a single-note call, while Black-capped Chickadees have a complex call.

What happens when Black-capped and Carolina Chickadees breed with the wrong species?

• They do not produce any offspring.

• They produce offspring that cannot sing.

• They produce hybrids.

• They produce sterile offspring.

Where does the hybrid zone between Black-capped and Carolina Chickadees extend?

• From California to Nevada

• From Florida to Texas

• From Maine to Georgia

• From New Jersey to Kansas

What has been the effect of rising winter temperatures on the distribution of Carolina Chickadees?

• Their population has remained stable.

• They have moved further north.

• Their population has decreased.

• They have moved further south.