19 Apr 16 Mexicali en route Carro Puerto saw many redwings in mesquites; the usual doves, which prefer to wait in the road until almost run over before flying off. There were two burrowing owls on the ground in a barren area between fields. A muskrat was swimming in irrigation ditch beside the road - this about an hour before dusk. We looked around for a campsite, and wound up beside an irrigation ditch on farmland, near the farmhouse which supplied dogs, chickens and a bull to keep us company. Noticed that there was a gas pump there; the place is Agua Caliente. The locked gate leads to the bubbling mud springs described by Nelson in 1906. Now they charge 5 pesos to get in. We camped just at dusk, and in turn to see a number of bats flying around, some of them big. Mr. Benson and Quast each got a Pipistrelle. We took a much needed bath and swim in the ditch. Could hear muskrats working - one was under some bamboo material from across the ditch, and made sucking noises. This afternoon also saw a black Phoebe and 4 nighthawks flicked out of thick mesquites. There are plenty of mosquitoes here.